TWI780873B - Contact lens product - Google Patents

Abstract

A contact lens product includes a multifocal contact lens and a buffer solution, wherein the contact lens is immersed in the buffer solution. The multifocal contact lens includes a central region and at least one annular region. The annular region surrounds the central region. A diopter of the annular region is different from a diopter of the central region. The annular region closest to a periphery of the multifocal contact lens is a first annular region. When the specific condition is satisfied, the myopia can be prevented, or the progression of the myopia can be controlled.

Description

contact lens products

The present invention relates to a contact lens product, and in particular to a contact lens product which can prevent myopia or control the progression of myopia.

According to the World Health Organization (WHO), the prevalence of myopia in the world is between 8% and 62%. However, a survey in Taiwan found that the myopia rate of adolescents and children under the age of 18 is as high as 85%. In other countries, the reason may be that due to the highly developed 3C electronic devices in recent years, the eyes of young children receive improper stimulation prematurely and cause excessive eye use. Current research shows that once a young child suffers from early-onset myopia, thereafter It will increase the degree of myopia at a certain speed. The study also pointed out that the younger the age of myopia, the higher the probability of developing high myopia (greater than or equal to 6.0 D) in the future, and high myopia patients are more likely to cause retinal detachment, glaucoma and other serious diseases. complication. Therefore, if the myopia can be controlled and slowed down when the child is detected to be suffering from pseudomyopia, it can effectively prevent the pseudomyopia from turning into myopia, thereby preventing the occurrence of high myopia.

The main cause of myopia is the variation of the optical structure of the eyeball. The formation of optical imaging is mainly affected by factors such as the cornea, lens, and length of the eyeball. Normal eyes can correctly focus the image on the retina to obtain a clear image. For myopic patients, it may be due to too strong refraction of the cornea and lens (refractive myopia) or too long axial distance of the eyeball (axial myopia), causing the image to focus in front of the retina, resulting in blurred myopia symptoms. Myopia symptoms in young children can be divided into myopia and pseudomyopia. Among them, myopia is a situation where the eyeball axis is too long and cannot be recovered by correction. However, if it is pseudomyopia, it is short-term myopia caused by excessive ciliary muscle force Symptoms are correctable myopia symptoms. There are many ways to correct children’s pseudomyopia clinically, mainly including orthokeratology lenses and long-acting mydriatic agents, but the orthokeratology lenses tend to cause high external pressure and cause discomfort to the wearer , while generally using long-acting mydriatic agents alone requires a higher concentration of dosage to exert the effect of correcting myopia, but it also relatively increases the probability of drug side effects.

An object of the present invention is to provide a contact lens product, which comprises a multifocal contact lens and a buffer solution, and the multifocal contact lens is soaked in the buffer solution. In this way, the multifocal contact lens can provide physical correction, thereby effectively preventing myopia or controlling the progression of myopia, avoiding wearing discomfort and reducing the probability of drug side effects.

According to the present invention, a contact lens product is provided, comprising a multifocal contact lens and a buffer solution. The multifocal contact lens includes a central area and a first annular area, the first annular area surrounds the central area, and the diopter of the first annular area is different from that of the central area. Wherein, the composition for preparing the multifocal contact lens contains 10%-96% of hydroxyethyl methacrylate. Multifocal contact lenses are soaked in a buffered solution. The diopter of the central area of the multifocal contact lens is PowC, the maximum diopter of the first annular area of the multifocal contact lens is PowP1, the diameter of the central area of the multifocal contact lens is DiC, and the first annular area of the multifocal contact lens is DiC. The diameter of the outer circle is DiP1, which satisfies the following conditions: 2.25 D ≤ PowP1 – PowC; DiC ≤ 5 mm; and 0.43 ≤ DiC/DiP1 ≤ 1.

Please refer to FIG. 1, which is a schematic diagram illustrating a contact lens product 100 according to an embodiment of the present invention. The contact lens product 100 includes a multifocal contact lens 110 and a buffer solution 120. The multifocal contact lens 110 is soaked in the buffer solution 120. middle.

Please also refer to FIG. 2 , which is a schematic plan view of the multifocal contact lens 110 in FIG. 1 . The multifocal contact lens 110 includes a central area 111 and a first annular area 112, the first annular area 112 concentrically surrounds the central area 111, the diopter of the first annular area 112 is different from that of the central area 111, thereby, it can be given The multi-focal function of the multi-focal contact lens 110 enables peripheral images to be focused in front of the retina, thereby effectively slowing down the growth of the axial distance of the eyeball and avoiding the deterioration of myopia. According to an embodiment of the present invention, the diopter of the central area 111 is fixed.

At least one of the central area 111 and the first annular area 112 of the multifocal contact lens 110 is aspherical, thereby facilitating the design of the first annular area 112 to have a gradually changing diopter.

Please refer to FIG. 1 again, the buffer solution 120 contains a cycloplegic agent, and the concentration of the cycloplegic agent in the buffer solution 120 is ConA, which satisfies the following condition: 0 < ConA ≤ 1%. In this way, the concentration of cycloplegic agent is appropriate, which helps to relax the ciliary muscle and reduces the chance of drug side effects. Alternatively, it may satisfy the following condition: 0 < ConA ≤ 0.5%. Alternatively, it may satisfy the following condition: 0 < ConA ≤ 0.25%. Alternatively, it may satisfy the following condition: 0 < ConA ≤ 0.1%. Alternatively, it may satisfy the following condition: 0 < ConA ≤ 0.05%. Alternatively, it may satisfy the following condition: 0 < ConA ≤ 0.01%. The aforementioned buffer solution 120 is prepared by first preparing a basic solution. The formula of the basic solution can be a solution for soaking and preserving contact lenses on the market, and then adding cycloplegic agent to the required concentration in the basic solution. In addition, there is no chemical reaction between the base solution and the cycloplegic agent.

According to the aforementioned contact lens product 100, the composition for preparing the multifocal contact lens 110 may include a blue light absorbing component. In this way, the multifocal contact lens 110 can absorb high-energy blue light, thereby reducing the probability of the retina being damaged by the blue light. According to an embodiment of the present invention, the blue light absorbing component may be 4-(phenyldiazenyl)phenyl methacrylate.

According to the aforementioned contact lens product 100, the composition for preparing the multifocal contact lens 110 may include UV (Ultraviolet) absorbing components, and the UV absorbing components may be but not limited to 2-[3-(2H-benzotriazol-2-yl )-4-hydroxyphenyl]ethyl 2-methacrylic acid (2-[3-(2H-Benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate), 2-acrylic acid 2-(4-benzoyl -3-hydroxyphenoxy)ethyl ester (2-(4-benzoyl-3-hydroxyphenoxy)ethyl acrylate), 4-methacryloxy-2-hydroxybenzophenone (4-methacryloxy-2- hydroxybenzophenone), 2-phenylethyl acrylate (2-Phenylethyl acrylate), 2-styrene methacrylate (2-Phenylethyl methacrylate), 2-[2-hydroxy-5-[2-(methacrylic acid Oxygen)ethyl]phenyl]-2H-benzotriazole (2-(2'-Hydroxy-5'-Methacryloxyethylphenyl)-2H-Benzotriazole) or 2-(4-benzoyl-3-hydroxy 2-(4-Benzoyl-3-Hydroxyphenoxy) Ethyl Acrylate. In this way, the multifocal contact lens 110 can absorb high-energy UV light, thereby reducing the probability of the retina being damaged by the UV light. According to one embodiment of the present invention, the UV absorbing component is 2-[2-hydroxy-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole, according to another embodiment of the present invention For example, the UV absorbing component is 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate. The aforementioned UV absorbing ingredients may be used simultaneously or alone.

According to the aforementioned contact lens product 100, the material of the multifocal contact lens 110 can be Silicone Hydrogel, thereby effectively improving the oxygen permeability of the multifocal contact lens 110 and avoiding red eyes caused by corneal hypoxia , bloodshot, redness and other phenomena, in order to provide long-term wearing comfort. The aforementioned silicone hydrogels can be, but are not limited to, contact lens materials classified into Group 5 by the US Food and Drug Administration (USFDA), such as Balafilcon A, Comfilcon A, Efrofilcon A, Enfilcon A, Galyfilcon A, Lotrafilcon A, Lotrafilcon B, Narafilcon A, Narafilcon B, Senofilcon A, Delefilcon A, Somofilcon A and other materials.

The composition for preparing the aforementioned silicone hydrogel may include 2-Hydroxyethyl Methacrylate, 3-Methacryloyloxypropyltris(Trimethylsilyloxy) Silane , 2-Hydroxy-2-methyl-1-phenyl-1-propanone (2-Hydroxy-2-Methyl-Propiophenone), N-vinyl-2-pyrrolidone (N-Vinyl-2-Pyrrolidinone), N ,N-Dimethacrylamide (N,N-Dimethyl Acrylamide), Ethylene Glycol Dimethacrylate, (3-Methacryloxy-2-hydroxypropoxy)propane Bis(trimethylsiloxy)methyl (3-(3-Methacryloxy-2-Hydroxypropoxy)Propylbis(Trimethylsiloxy)Methylsilane), Isopropyl Alcohol and Methacrylic Acid.

Preferably, the percentage by weight of each component in the composition of the silicone hydrogel is as follows: 0.05% to 25% of hydroxyethyl methacrylate, and 0.05% to 25% of methacryloxypropyl tris(trimethylsiloxane) silane. 0.1%~40%, 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.01%~5%, N-vinyl-2-pyrrolone is 0.1%~35%, N,N- Dimethacrylamide is 0.1%~40%, ethylene glycol dimethacrylate is 0.01%~5%, (3-methacryloxy-2-hydroxypropoxy)propyl bis(tri Methylsilyloxy)methyl is 0.1%~30%, isopropanol is 0.1%~30%, and methacrylic acid is 0.01%~5%.

More preferably, the percentage by weight of each component in the composition of the silicone hydrogel is as follows: 0.1% to 10% of hydroxyethyl methacrylate, and 0.1% to 10% of methacryloxypropyl tris(trimethylsiloxane) silane. 1%~40%, 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.1%~2%, N-vinyl-2-pyrrolone is 1%~35%, N,N- Dimethacrylamide is 1%~20%, ethylene glycol dimethacrylate is 0.1%~2%, (3-methacryloxy-2-hydroxypropoxy)propylbis(tri Methylsilyloxy) methyl is 1%~30%, isopropanol is 1%~20%, and methacrylic acid is 0.1%~2%.

The composition for preparing the aforementioned silicone hydrogel may include hydroxyethyl methacrylate, methacryloxypropyl tris(trimethylsiloxane) silane, 2-hydroxy-2-methyl-1-phenyl- 1-acetone, N-vinyl-2-pyrrolone, N,N-dimethylacrylamide, ethylene glycol dimethacrylate, 3-acetyloxy-2-hydroxypropoxypropyl Terminal polydimethylsiloxane ((3-Acryloxy-2-Hydroxypropoxypropyl) Terminated Polydimethylsiloxane) and n-hexanol (1-Hexanol).

Preferably, the percentage by weight of each component in the composition of the silicone hydrogel is as follows: 0.05% to 25% of hydroxyethyl methacrylate, and 0.05% to 25% of methacryloxypropyl tris(trimethylsiloxane) silane. 0.1%~40%, 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.01%~5%, N-vinyl-2-pyrrolone is 0.1%~35%, N,N- 0.1%~40% dimethylacrylamide, 0.01%~5% ethylene glycol dimethacrylate, 3-acetyloxy-2-hydroxypropoxypropyl-terminated polydimethylsilane Oxylkane is 0.1%~40% and n-hexanol is 0.1%~30%.

More preferably, the percentage by weight of each component in the composition of the silicone hydrogel is as follows: 0.1% to 10% of hydroxyethyl methacrylate, and 0.1% to 10% of methacryloxypropyl tris(trimethylsiloxane) silane. 1%~40%, 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.1%~2%, N-vinyl-2-pyrrolone is 1%~35%, N,N- 1%~20% dimethylacrylamide, 0.1%~2% ethylene glycol dimethacrylate, 3-acetyloxy-2-hydroxypropoxypropyl-terminated polydimethylsilane Oxylkane is 1%~40% and n-hexanol is 1%~30%.

The composition for preparing the aforementioned silicone hydrogel may include hydroxyethyl methacrylate, methacryloxypropyl tris(trimethylsiloxane) silane, 2-hydroxy-2-methyl-1-phenyl- 1-acetone, N-vinyl-2-pyrrolone, N,N-dimethylacrylamide, dimethylsiloxane modified urethane oligomer (Polysiloxane Macromer), methyl methacrylate (Methyl Methacrylate) and ethanol (Ethanol).

Preferably, the percentage by weight of each component in the composition of the silicone hydrogel is as follows: 0.05% to 25% of hydroxyethyl methacrylate, and 0.05% to 25% of methacryloxypropyl tris(trimethylsiloxane) silane. 0.1%~40%, 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.01%~5%, N-vinyl-2-pyrrolone is 0.1%~35%, N,N- Dimethacrylamide is 0.1%~40%, dimethylsiloxane modified urethane oligomer is 0.1%~40%, methyl methacrylate is 0.1%~20%, and ethanol is 0.1%~ 30%.

More preferably, the percentage by weight of each component in the composition of the silicone hydrogel is as follows: 0.1% to 10% of hydroxyethyl methacrylate, and 0.1% to 10% of methacryloxypropyl tris(trimethylsiloxane) silane. 1%~40%, 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.1%~2%, N-vinyl-2-pyrrolone is 1%~35%, N,N- Dimethacrylamide is 1%~20%, dimethylsiloxane modified urethane oligomer is 1%~40%, methyl methacrylate is 1%~10%, and ethanol is 1%~ 20%.

According to an embodiment of the present invention, the composition of the silicone hydrogel may further include a blue light absorbing component or a UV absorbing component. Preferably, the weight percentage of the blue light absorbing component or the UV absorbing component in the aforementioned silicone hydrogel composition is 0.01%. ~10%, more preferably, the weight percentage of the blue light absorbing component or the UV absorbing component in the aforementioned silicon hydrogel composition is 0.1%~5%.

The oxygen permeability and hardness of the multifocal contact lens 110 can be effectively increased by adjusting the proportions of the components in the silicone hydrogel. In addition, other components can be added to the composition of the silicone hydrogel according to actual needs.

According to the contact lens product 100 mentioned above, the material of the multifocal contact lens 110 can be hydrogel (Hydrogel), so that the multifocal contact lens 110 can be kept moist, smooth, soft and comfortable, and can be worn for a long time. Wear it to avoid foreign body sensation when wearing it. The aforementioned hydrogel can be a contact lens material classified into the first group by the Food and Drug Administration of the United States, that is, a nonionic polymer (nonionic polymer) with a low water content (less than 50 weight percent), such as Helfilcon A&B, Hioxifilcon B, Mafilcon, Polymacon, Tefilcon, Tetrafilcon A and other materials. Alternatively, the aforementioned hydrogel can be a contact lens material classified into the second group by the U.S. Food and Drug Administration, that is, a nonionic polymer with a high water content (greater than 50 weight percent), such as Acofilcon A, Alfafilcon A , Hilafilcon B, Hioxifilcon A, Hioxifilcon B, Hioxifilcon D, Nelfilcon A, Nesofilcon A, Omafilcon A and Samfilcon A and other materials. Alternatively, the aforementioned hydrogel can be a contact lens material classified into the third group by the U.S. Food and Drug Administration, that is, an ionic polymer with a low water content (less than 50% by weight), such as Deltafilcon A and other materials. Alternatively, the aforementioned hydrogel can be the contact lens material of the fourth group approved by the U.S. Food and Drug Administration, that is, an ionomeric polymer with a high water content (greater than 50 weight percent), such as Etafilcon A, Focofilcon A, Methafilcon A, Methafilcon B, Ocufilcon A, Ocufilcon B, Ocufilcon C, Ocufilcon D, Ocufilcon E, Phemfilcon A, Vifilcon A and other materials.

The composition for preparing the aforementioned water gel may include hydroxyethyl methacrylate, ethylene glycol dimethacrylate, 2-hydroxy-2-methyl-1-phenyl-1-propanone, glycerol (Glycerol), trihydroxy Methylpropane Trimethacrylate (1,1,1-Trimethylol Propane Trimethacrylate) and Methacrylic Acid.

Preferably, the percentage by weight of each component in the aforementioned water gel composition is as follows: 10% to 96% of hydroxyethyl methacrylate, 0.01% to 5% of ethylene glycol dimethacrylate, 2-hydroxy- 0.01%~5% for 2-methyl-1-phenyl-1-propanone, 0.1%~30% for glycerin, 0.01%~5% for trimethylolpropane trimethacrylate and 0.01% for methacrylic acid %~5%.

More preferably, the percentage by weight of each component in the composition of the aforementioned water gel is as follows: 40%~96% of hydroxyethyl methacrylate, 0.1%~2% of ethylene glycol dimethacrylate, 2-hydroxy- 2-methyl-1-phenyl-1-propanone is 0.1%~2%, glycerin is 0.1%~20%, trimethylolpropane trimethacrylate is 0.1%~2%, and methacrylic acid is 0.1% %~2%.

The composition for preparing the aforementioned water gel may include hydroxyethyl methacrylate, ethylene glycol dimethacrylate, 2-hydroxy-2-methyl-1-phenyl-1-propanone, glycerin, trimethylolpropane Trimethacrylate and 2-methyl-2-propenoic acid-2,3-dihydroxypropyl ester (Glycerol Monomethacrylate).

Preferably, the percentage by weight of each component in the aforementioned water gel composition is as follows: 10%~94.87% of hydroxyethyl methacrylate, 0.01%~5% of ethylene glycol dimethacrylate, 2-hydroxy- 2-methyl-1-phenyl-1-propanone is 0.01%~5%, glycerin is 0.1%~30%, trimethylolpropane trimethacrylate is 0.01%~5%, and 2-methyl- 2-Acrylic acid-2,3-dihydroxypropyl ester is 5%~60%.

More preferably, the percentage by weight of each component in the composition of the aforementioned water gel is as follows: 40%~79.6% of hydroxyethyl methacrylate, 0.1%~2% of ethylene glycol dimethacrylate, 2-hydroxy- 2-methyl-1-phenyl-1-propanone is 0.1%~2%, glycerin is 0.1%~20%, trimethylolpropane trimethacrylate is 0.1%~2%, and 2-methyl- 2-Acrylic acid-2,3-dihydroxypropyl ester is 20%~50%.

The composition for preparing the aforementioned hydrogel may include hydroxyethyl methacrylate, ethylene glycol dimethacrylate, 2-hydroxy-2-methyl-1-phenyl-1-propanone, glycerin and N-vinyl- 2-Pyrrolone.

Preferably, the percentage by weight of each component in the aforementioned water gel composition is as follows: 10% to 96% of hydroxyethyl methacrylate, 0.01% to 5% of ethylene glycol dimethacrylate, 2-hydroxy- 2-methyl-1-phenyl-1-propanone is 0.01%~5%, glycerin is 0.1%~30%, and N-vinyl-2-pyrrolone is 0.1%~25%.

More preferably, the percentage by weight of each component in the composition of the aforementioned water gel is as follows: 40%~96% of hydroxyethyl methacrylate, 0.1%~2% of ethylene glycol dimethacrylate, 2-hydroxy- 2-methyl-1-phenyl-1-propanone is 0.1%~2%, glycerin is 1%~20%, and N-vinyl-2-pyrrolone is 0.1%~10%.

According to an embodiment of the present invention, the composition of the water gel may further include a blue light absorbing component or a UV absorbing component. Preferably, the weight percentage of the blue light absorbing component or the UV absorbing component in the water gel composition is 0.01%~10% %, more preferably, the weight percentage of the blue light absorbing component or the UV absorbing component in the composition of the aforementioned water gel is 0.1%~5%.

By adjusting the ratio of each component in the aforementioned hydrogel, the water content and softness of the multifocal contact lens 110 can be effectively increased. In addition, other ingredients can be added to the composition of the aforementioned hydrogel according to actual needs. Monomers used in hydrogel compositions and silicone hydrogel compositions, such as hydroxyethyl methacrylate, methacrylic acid, 2-methyl-2-acrylic acid-2,3-dihydroxypropyl ester, N-vinyl -2-pyrrolidone, methacryloxypropyltris(trimethylsiloxane)silane, N,N-dimethylacrylamide, (3-methacryloxy-2-hydroxypropyl Oxy)propylbis(trimethylsiloxy)methyl, 3-acetyloxy-2-hydroxypropoxypropyl-terminated polydimethylsiloxane, methyl methacrylate, etc., also They can be replaced with each other according to actual needs.

Please refer to FIG. 2 again, the diameter of the central area 111 of the multifocal contact lens 110 is DiC, which can satisfy the following conditions: 4 mm ≤ DiC ≤ 10 mm. In this way, the pupil size can be elastically adjusted according to different physiological states, and the accuracy of myopia correction by the central area 111 can be improved, so that images can be fully and clearly presented on the retina. Preferably, it can satisfy the following condition: 5 mm ≤ DiC ≤ 9 mm.

The outer diameter of the first annular zone 112 of the multifocal contact lens 110 is DiP1, which can satisfy the following conditions: 6 mm ≤ DiP1 ≤ 17 mm. In this way, it can be elastically adjusted according to the size of the eye cleft, so as to provide a proper fit of the multifocal contact lens 110 and increase the stability of the multifocal contact lens 110 after wearing. Preferably, it can satisfy the following condition: 7 mm ≤ DiP1 ≤ 15 mm.

The diameter of the central zone 111 of the multifocal contact lens 110 is DiC, and the outer diameter of the first annular zone 112 of the multifocal contact lens 110 is DiP1, which can satisfy the following conditions: 0.15≤DiC/DiP1＜1. Therefore, the size of DiC/DiP1 is appropriate, which is beneficial to design an appropriate multifocal contact lens 110 according to the physiological condition of the individual eyeball, and further helps to correct myopia.

The diopter of the central area 111 of the multifocal contact lens 110 is PowC, which can satisfy the following condition: -6.00 ≤ PowC ≤ -0.25. In this way, according to the user's needs, an appropriate degree of corrected myopia can be provided, thereby providing a clear image.

The maximum diopter of the first annular zone 112 of the multifocal contact lens 110 is PowP1, which can satisfy the following condition: -5.50 ≤ PowP1 ≤ -0.50. In this way, the maximum diopter of the first annular region 112 can be appropriately designed, which is beneficial for the correction of myopia.

The diopter of the central zone 111 of the multifocal contact lens 110 is PowC, and the maximum diopter of the first annular zone 112 of the multifocal contact lens 110 is PowP1, which can satisfy the following condition: |PowC − PowP1| ≤ 3. Thereby, it is beneficial to correct myopia, slow down the diopter increase of the first ring-shaped area 112, and avoid discomfort caused by excessive maximum diopter increase. Alternatively, it may satisfy the following condition: |PowC – PowP1| ≤ 2. Alternatively, it may satisfy the following condition: |PowC – PowP1| ≤ 1.5. Alternatively, it may satisfy the following condition: |PowC – PowP1| ≤ 1. More alternatively, it may satisfy the following condition: |PowC – PowP1| ≤ 0.5. Alternatively, it may satisfy the following condition: |PowC – PowP1| ≤ 0.25.

Please refer to FIG. 3 , which is a schematic plan view of a multifocal contact lens 210 according to another embodiment of the present invention. The multifocal contact lens 210 includes a central area 211, a first annular area 212 and a second annular area 213, the central area 211, the second annular area 213, and the first annular area 212 are sequentially connected from the center to the periphery and are concentric with each other. The diameter of the central area 211 is DiC, the outer diameter of the first annular area 212 is DiP1, and the outer diameter of the second annular area 213 is DiP2, wherein the diopter of the second annular area 213 is different from that of the central area 211, The diopter of the first annular zone 212 is different from that of the central zone 211 . In this way, the multifocal contact lens 210 can be endowed with a multifocal function, so that peripheral images can be focused in front of the retina, thereby effectively slowing down the growth of the axial distance of the eyeball and avoiding the deterioration of myopia. According to an embodiment of the present invention, the diopter of the central area 211 is fixed.

At least one of the central area 211, the first annular area 212 and the second annular area 213 may be aspheric, thereby facilitating the design of the first annular area 212 and/or the second annular area 213 to have a gradient of diopters.

The outer diameter of the second annular zone 213 of the multifocal contact lens 210 is DiP2, which can satisfy the following conditions: 5 mm ≤ DiP2 ≤ 13 mm. In this way, the increase in diopter can be effectively alleviated. Preferably, it can satisfy the following condition: 6 mm ≤ DiP2 ≤ 12 mm.

The diameter of the central zone 211 of the multifocal contact lens 210 is DiC, and the outer diameter of the second annular zone 213 of the multifocal contact lens 210 is DiP2, which can satisfy the following condition: 0.2≤DiC/DiP2＜1. Thereby, the increase of the diopter of the second annular region 213 can be effectively slowed down, and the discomfort caused by the excessive increase of the diopter can be reduced.

Other properties of the multifocal contact lens 210 may be the same as those of the multifocal contact lens 110 , and will not be repeated here.

Please refer to FIG. 4, which is a schematic plan view of a multifocal contact lens 310 according to another embodiment of the present invention. The multifocal contact lens 310 includes a central area 311, a first annular area 312, and a second annular area 313. And the 3rd annular area 314, the central area 311, the 3rd annular area 314, the 2nd annular area 313, the first annular area 312 are successively connected and concentric from the center to the periphery, the diameter of the central area 311 is DiC, the first The outer circle diameter of the annular zone 312 is DiP1, the outer circle diameter of the second annular zone 313 is DiP2, and the outer circle diameter of the third annular zone 314 is DiP3, wherein the diopter of the third annular zone 314 is different from that of the central zone 311 , the diopter of the second annular area 313 is different from that of the central area 311 , and the diopter of the first annular area 312 is different from that of the central area 311 . In this way, the multifocal contact lens 310 can be endowed with a multifocal function, so that peripheral images can be focused in front of the retina, thereby effectively slowing down the growth of the axial distance of the eyeball and avoiding the deterioration of myopia. According to an embodiment of the present invention, the diopter of the central area 311 is fixed.

It can be seen from Fig. 2 to Fig. 4 that according to the multifocal contact lens of the present invention, at least one annular zone (the first annular zone (112, 212, 312) , the second annular area (213, 313), the third annular area (314)), the number of annular areas and the configuration of their diopters can be elastically adjusted to meet the physiological conditions of the individual eyeballs, thereby improving the effect of correcting myopia and effectively Prevent myopia or control the progression of myopia.

According to the present invention, there is also provided a contact lens product, including a multifocal contact lens, wherein the composition for preparing the multifocal contact lens includes a blue light absorbing component. In this way, multifocal contact lenses can absorb high-energy blue light, thereby reducing the chance of retinal damage from blue light. Regarding the blue light absorbing component, the material of the multifocal contact lens, and other details of the multifocal contact lens, please refer to the above-mentioned contents in FIG. 1 to FIG. 4 , which will not be repeated here.

<First embodiment>

The multifocal contact lens of the first embodiment includes a central area and a first annular area, the first annular area concentrically surrounds the central area, at least one of the central area and the first annular area is an aspheric surface, regarding the first embodiment Example of the structure of multifocal contact lenses can refer to Figure 2.

In the multifocal contact lens of the first embodiment, the diameter of the central area is DiC, the diameter of the outer circle of the first annular area is DiP1, the diopter of the central area is PowC, and the maximum diopter of the first annular area is PowP1. Please refer to Table 1 for the values of DiC, DiP1, DiC/DiP1, PowC, PowP1, |PowC - PowP1| in an embodiment. Table 1, the first embodiment DiC (mm) 5.00 PowC (D) -0.25 DiP1 (mm) 13.00 PowP1 (D) 0.25 DiC/DiP1 0.38 |PowC – PowP1| (D) 0.50

Please refer to Table 2 and Fig. 5 at the same time. Table 2 lists the radius and corresponding diopter of the multifocal contact lens of the first embodiment, and Fig. 5 shows the radius and diopter of the multifocal contact lens of the first embodiment. The relationship diagram (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 2 and Figure 5, the diopter of the central area is fixed, and the diopter of the first annular area is different from that of the central area. Specifically, the diopter of the first ring The diopter of the shaped zone is greater than that of the central zone, and the diopter of the first annular zone increases progressively as it gets away from the central zone. Table two, the first embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -6.50 0.25 0.50 -0.25 -6.00 0.19 1.00 -0.25 -5.50 0.13 1.50 -0.25 -5.00 0.06 2.00 -0.25 -4.50 0.00 2.50 -0.25 -4.00 -0.06 3.00 -0.19 -3.50 -0.13 3.50 -0.13 -3.00 -0.19 4.00 -0.06 -2.50 -0.25 4.50 0.00 -2.00 -0.25 5.00 0.06 -1.50 -0.25 5.50 0.13 -1.00 -0.25 6.00 0.19 -0.50 -0.25 6.50 0.25 0.00 -0.25

The material of the multifocal contact lens in the first embodiment is hydrogel. Please refer to Table 3 for the composition of the hydrogel in the first embodiment. Table three Element Content (wt%) Hydroxyethyl methacrylate 82 2-[2-Hydroxy-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole 1.2 Ethylene glycol dimethacrylate 0.4 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.5 glycerin 13.5 Trimethylolpropane trimethacrylate 0.2 Methacrylate 2.2

As can be seen from Table 3, by adding 2-[2-hydroxyl-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole, the multifocal contact lens of the first embodiment Can absorb UV light.

<Second embodiment>

The multifocal contact lens of the second embodiment includes a central area, a first annular area and a second annular area, the central area, the second annular area, and the first annular area are sequentially connected from the center to the periphery and are concentric with the center of the circle, and the center At least one of the region, the second annular region and the first annular region is an aspheric surface. For the structure of the multifocal contact lens in the second embodiment, please refer to FIG. 3 .

In the multifocal contact lens of the second embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the diopter of the central area is PowC. The maximum diopter of the annular area is PowP1, the maximum diopter of the second annular area is PowP2, DiC, DiP1, DiP2, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, |PowC – PowP1| See Table 4 for the values of . Table four, the second embodiment DiC (mm) 5.00 PowC (D) -0.50 DiP1 (mm) 16.00 PowP1 (D) 0.50 DiP2 (mm) 13.00 PowP2 (D) 0.50 DiC/DiP1 0.31 |PowC – PowP1| (D) 1.00 DiC/DiP2 0.38

Please refer to Table 5 and Figure 6 at the same time. Table 5 lists the radius of the multifocal contact lens of the second embodiment and its corresponding diopter, and Figure 6 shows the radius and diopter of the multifocal contact lens of the second embodiment. Relationship diagram (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 5 and Figure 6, the diopter of the central area is fixed, the diopter of the second annular area is different from that of the central area, and the diopter of the first annular area is different from that of the central area. The diopters of the central area are different, specifically, the diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases as the distance from the central area increases, the diopter of the first annular area is greater than that of the central area, and The diopter of the first annular zone is fixed. Table five, the second embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -8.00 0.50 0.50 -0.50 -7.50 0.50 1.00 -0.50 -7.00 0.50 1.50 -0.50 -6.50 0.50 2.00 -0.50 -6.00 0.38 2.50 -0.50 -5.50 0.25 3.00 -0.38 -5.00 0.13 3.50 -0.25 -4.50 0.00 4.00 -0.13 -4.00 -0.13 4.50 0.00 -3.50 -0.25 5.00 0.13 -3.00 -0.38 5.50 0.25 -2.50 -0.50 6.00 0.38 -2.00 -0.50 6.50 0.50 -1.50 -0.50 7.00 0.50 -1.00 -0.50 7.50 0.50 -0.50 -0.50 8.00 0.50 0.00 -0.50

The material of the multifocal contact lens of the second embodiment is hydrogel. Please refer to Table 6A for the composition of the hydrogel of the second embodiment. Table 6A Element Content (wt%) Hydroxyethyl methacrylate 44.8 2-[2-Hydroxy-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole 1.2 Ethylene glycol dimethacrylate 0.6 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 10.5 Trimethylolpropane trimethacrylate 0.3 2-Methyl-2-propenoic acid-2,3-dihydroxypropyl ester 42

It can be seen from Table 6A that by adding 2-[2-hydroxyl-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole, the multifocal invisible Glasses can absorb UV light.

Please refer to Fig. 7, which is a graph showing the relationship between wavelength and light transmittance of the multifocal contact lens of the second embodiment and the multifocal contact lens of the first comparative example. The difference between the first comparative example and the second embodiment is The first comparative example did not add UV absorbing components, specifically, the first comparative example replaced 2-[2-hydroxyl-5-[2-(methacryloxy)ethyl]phenyl with hydroxyethyl methacrylate ]-2H-benzotriazole, from the 7th figure, the multifocal contact lenses of the first comparative example and the second embodiment can be deduced for the blocking rate of UV-A (UV light with a wavelength range of 316nm~380nm), and the calculation method As follows: (1-average transmittance of wavelength 316~380nm)*100%, and the blocking of UV-B (UV light with a wavelength range of 280nm~315nm) of the multifocal contact lenses of the first comparative example and the second embodiment The calculation method is as follows: (average transmittance of 1-280nm~315nm) × 100%, and the results are listed in Table 6B. Table 6B first comparative example second embodiment UV-A blocking rate (%) (316 nm ~380 nm) 5.92 73.19 UV-B blocking rate (%) (280 nm ~315 nm) 7.91 96.36

As can be seen from Table 6B, compared with the first comparative example, the second embodiment has a much higher blocking rate for UV-A and UV-B than the first comparative example, in other words, the multi-focus invisible of the second embodiment Glasses can effectively absorb UV light, thereby reducing the chance of retinal damage from UV light.

<Third Embodiment>

The multifocal contact lens of the third embodiment includes a central area, a first annular area and a second annular area, the central area, the second annular area, and the first annular area are sequentially connected from the center to the periphery and are concentric with the center of the circle, and the center At least one of the region, the second annular region and the first annular region is an aspheric surface. For the structure of the multifocal contact lens in the third embodiment, please refer to FIG. 3 .

In the multifocal contact lens of the third embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the diopter of the central area is PowC. The maximum diopter of the annular area is PowP1, the maximum diopter of the second annular area is PowP2, DiC, DiP1, DiP2, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, |PowC – PowP1| See Table 7 for the values of . Table seven, the third embodiment DiC (mm) 4.00 PowC (D) -1.00 DiP1 (mm) 15.00 PowP1 (D) 0.25 DiP2 (mm) 6.00 PowP2 (D) -0.50 DiC/DiP1 0.27 |PowC – PowP1| (D) 1.25 DiC/DiP2 0.67

Please refer to Table 8 and Fig. 8 at the same time. Table 8 lists the radius of the multifocal contact lens of the third embodiment and its corresponding diopter, and Fig. 8 is the ratio of the radius and diopter of the multifocal contact lens of the third embodiment. Relationship diagram (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 8 and Figure 8, the diopter of the central area is fixed, the diopter of the second annular area is different from that of the central area, and the diopter of the first annular area is different from that of the central area. The diopters of the central area are different, specifically, the diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases as the distance from the central area increases, the diopter of the first annular area is greater than that of the central area, and The diopter of the first annular zone increases progressively away from the central zone. Table eight, the third embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -7.50 0.25 0.50 -1.00 -7.00 0.17 1.00 -1.00 -6.50 0.08 1.50 -1.00 -6.00 0.00 2.00 -1.00 -5.50 -0.08 2.50 -0.75 -5.00 -0.17 3.00 -0.50 -4.50 -0.25 3.50 -0.42 -4.00 -0.33 4.00 -0.33 -3.50 -0.42 4.50 -0.25 -3.00 -0.50 5.00 -0.17 -2.50 -0.75 5.50 -0.08 -2.00 -1.00 6.00 0.00 -1.50 -1.00 6.50 0.08 -1.00 -1.00 7.00 0.17 -0.50 -1.00 7.50 0.25 0.00 -1.00

The material of the multifocal contact lens of the third embodiment is hydrogel. Please refer to Table 9 for the composition of the hydrogel of the third embodiment. Table nine Element Content (wt%) Hydroxyethyl methacrylate 91 2-[2-Hydroxy-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole 1 Ethylene glycol dimethacrylate 0.6 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 6.3 N-vinyl-2-pyrrolone 0.5

As can be seen from Table 9, by adding 2-[2-hydroxyl-5-[2-(methacryloxy)ethyl]phenyl]-2H-benzotriazole, the multifocal contact lens of the third embodiment Can absorb UV light.

<Fourth embodiment>

The multifocal contact lens of the fourth embodiment includes a central area and a first annular area, the first annular area concentrically surrounds the central area, at least one of the central area and the first annular area is an aspheric surface, regarding the fourth embodiment Example of the structure of multifocal contact lenses can refer to Figure 2.

In the multifocal contact lens of the fourth embodiment, the diameter of the central area is DiC, the diameter of the outer circle of the first annular area is DiP1, the diopter of the central area is PowC, and the maximum diopter of the first annular area is PowP1. For the values of DiC, DiP1, DiC/DiP1, PowC, PowP1, |PowC - PowP1| of the four embodiments, please refer to Table 10. Table ten, the fourth embodiment DiC (mm) 7.00 PowC (D) -1.50 DiP1 (mm) 14.00 PowP1 (D) -1.00 DiC/DiP1 0.50 |PowC – PowP1| (D) 0.50

Please refer to Table 11 and Fig. 9 at the same time. Table 11 lists the radius of the multifocal contact lens of the fourth embodiment and the corresponding diopter (the negative value only indicates the radius distance in the opposite direction), and Fig. 9 is the first The relationship between the radius and the diopter of the multifocal contact lens of the fourth embodiment can be seen from Table 11 and Figure 9 that the diopter of the central area is fixed, and the diopter of the first annular area is different from that of the central area. Specifically, The diopter of the first annular area is greater than the diopter of the central area, and the diopter of the first annular area increases gradually as it gets away from the central area. Table eleven, the fourth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -7.00 -1.00 0.50 -1.50 -6.50 -1.07 1.00 -1.50 -6.00 -1.14 1.50 -1.50 -5.50 -1.21 2.00 -1.50 -5.00 -1.29 2.50 -1.50 -4.50 -1.36 3.00 -1.50 -4.00 -1.43 3.50 -1.50 -3.50 -1.50 4.00 -1.43 -3.00 -1.50 4.50 -1.36 -2.50 -1.50 5.00 -1.29 -2.00 -1.50 5.50 -1.21 -1.50 -1.50 6.00 -1.14 -1.00 -1.50 6.50 -1.07 -0.50 -1.50 7.00 -1.00 0.00 -1.50

The material of the multifocal contact lens of the fourth embodiment is hydrogel. For the composition of the hydrogel of the fourth embodiment, please refer to Table 12A. Table 12A Element Content (wt%) Hydroxyethyl methacrylate 82 2-(4-Benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate 1 Ethylene glycol dimethacrylate 0.4 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 13.6 Trimethylolpropane trimethacrylate 0.2 Methacrylate 2.2

It can be known from Table 12A that by adding 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate, the multifocal contact lens of the fourth embodiment can absorb UV light.

Please refer to Fig. 10, which is a graph showing the relationship between wavelength and light transmittance of the multifocal contact lens of the fourth embodiment and the multifocal contact lens of the second comparative example. The difference between the second comparative example and the fourth embodiment is The second comparative example does not add UV absorbing components, specifically, the second comparative example replaces 2-(4-benzoyl-3-hydroxyphenoxy) ethyl methacrylate with hydroxyethyl methacrylate, by The 10th figure can calculate the rejection rate of the multifocal contact lenses of the second comparative example and the fourth embodiment for UV-A (UV light with a wavelength range of 316nm~380nm), and the calculation method is as follows: (1-wavelength 316~380nm Average transmittance)*100%, and the blocking rate of the multifocal contact lenses of the second comparative example and the fourth embodiment for UV-B (UV light with a wavelength range of 280nm~315nm), the calculation method is as follows: (1-280nm ~315nm average transmittance)×100%, and the results are listed in Table 12B. Table 12B Second comparative example Fourth embodiment UV-A blocking rate (%) (316 nm ~380 nm) 6.44 79.32 UV-B blocking rate (%) (280 nm ~315 nm) 8.76 98.39

It can be seen from Table 12B that, compared with the second comparative example, the fourth embodiment has a much higher rejection rate to UV-A and UV-B than the second comparative example, in other words, the multi-focus of the fourth embodiment Contact lenses can effectively absorb UV light, thereby reducing the chance of retinal damage from UV light.

<Fifth Embodiment>

The multifocal contact lens of the fifth embodiment comprises a central area, a first annular area and a second annular area, the central area, the second annular area, and the first annular area are sequentially connected from the center to the periphery and concentric with the center of the circle, and the center At least one of the region, the second annular region and the first annular region is an aspheric surface. For the structure of the multifocal contact lens in the fifth embodiment, please refer to FIG. 3 .

In the multifocal contact lens of the fifth embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the diopter of the central area is PowC. The maximum diopter of the annular zone is PowP1, and the maximum diopter of the second annular zone is PowP2, DiC, DiP1, DiP2, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, |PowC – PowP1| See Table 13 for the values of . Table 13, the fifth embodiment DiC (mm) 8.00 PowC (D) -2.00 DiP1 (mm) 15.00 PowP1 (D) 0 DiP2 (mm) 11.00 PowP2 (D) 0 DiC/DiP1 0.53 |PowC – PowP1| (D) 2.00 DiC/DiP2 0.73

Please refer to Table 14 and Fig. 11 at the same time. Table 14 lists the radius and corresponding diopter of the multifocal contact lens of the fifth embodiment, and Fig. 11 is the radius and the corresponding diopter of the multifocal contact lens of the fifth embodiment. Diopter relationship diagram (negative value only indicates the radius distance in the opposite direction), as can be seen from Table 14 and Figure 11, the diopter of the central area is fixed, the diopter of the second annular area is different from that of the central area, and the diopter of the first annular area The diopter of the second annular area is different from that of the central area. Specifically, the diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases with distance from the central area. The diopter of the first annular area is greater than that of the central area. diopter, and the diopter of the first annular zone is fixed. Table 14, the fifth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -7.50 0.00 0.50 -2.00 -7.00 0.00 1.00 -2.00 -6.50 0.00 1.50 -2.00 -6.00 0.00 2.00 -2.00 -5.50 0.00 2.50 -2.00 -5.00 -0.67 3.00 -2.00 -4.50 -1.33 3.50 -2.00 -4.00 -2.00 4.00 -2.00 -3.50 -2.00 4.50 -1.33 -3.00 -2.00 5.00 -0.67 -2.50 -2.00 5.50 0.00 -2.00 -2.00 6.00 0.00 -1.50 -2.00 6.50 0.00 -1.00 -2.00 7.00 0.00 -0.50 -2.00 7.50 0.00 0.00 -2.00

The material of the multifocal contact lens in the fifth embodiment is hydrogel. Please refer to Table 15 for the composition of the hydrogel in the fifth embodiment. Table 15 Element Content (wt%) Hydroxyethyl methacrylate 45 2-(4-Benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate 0.9 Ethylene glycol dimethacrylate 0.6 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 10.6 Trimethylolpropane trimethacrylate 0.3 2-Methyl-2-propenoic acid-2,3-dihydroxypropyl ester 42

It can be known from Table 15 that the multifocal contact lens of the fifth embodiment can absorb UV light by adding 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate.

<Sixth embodiment>

The multifocal contact lens of the sixth embodiment includes a central area and a first annular area, the first annular area concentrically surrounds the central area, at least one of the central area and the first annular area is an aspheric surface, regarding the sixth embodiment Example of the structure of multifocal contact lenses can refer to Figure 2.

In the multifocal contact lens of the sixth embodiment, the diameter of the central area is DiC, the diameter of the outer circle of the first annular area is DiP1, the diopter of the central area is PowC, and the maximum diopter of the first annular area is PowP1. For the values of DiC, DiP1, DiC/DiP1, PowC, PowP1, |PowC - PowP1| of the six embodiments, please refer to Table 16. Table sixteen, the sixth embodiment DiC (mm) 9.00 PowC (D) -2.50 DiP1 (mm) 14.00 PowP1 (D) -2.25 DiC/DiP1 0.64 |PowC – PowP1| (D) 0.25

Please refer to Table 17 and Fig. 12 at the same time. Table 17 lists the radius and corresponding diopter of the multifocal contact lens of the sixth embodiment, and Fig. 12 shows the radius and the corresponding diopter of the multifocal contact lens of the sixth embodiment. The relationship diagram of diopters (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 17 and Figure 12, the diopter of the central area is fixed, and the diopter of the first annular area is different from that of the central area. Specifically, The diopter of the first annular area is greater than that of the central area, and the diopter of the first annular area increases gradually as it gets away from the central area. Table seventeen, the sixth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -7.00 -2.25 0.50 -2.50 -6.50 -2.30 1.00 -2.50 -6.00 -2.35 1.50 -2.50 -5.50 -2.40 2.00 -2.50 -5.00 -2.45 2.50 -2.50 -4.50 -2.50 3.00 -2.50 -4.00 -2.50 3.50 -2.50 -3.50 -2.50 4.00 -2.50 -3.00 -2.50 4.50 -2.50 -2.50 -2.50 5.00 -2.45 -2.00 -2.50 5.50 -2.40 -1.50 -2.50 6.00 -2.35 -1.00 -2.50 6.50 -2.30 -0.50 -2.50 7.00 -2.25 0.00 -2.50

The material of the multifocal contact lens in the sixth embodiment is hydrogel. Please refer to Table 18 for the composition of the hydrogel in the sixth embodiment. Table 18 Element Content (wt%) Hydroxyethyl methacrylate 90.4 2-(4-Benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate 1.2 Ethylene glycol dimethacrylate 0.6 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.7 glycerin 6.3 N-vinyl-2-pyrrolone 0.8

It can be known from Table 18 that the multifocal contact lens of the sixth embodiment can absorb UV light by adding 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate.

<Seventh embodiment>

The multifocal contact lens of the seventh embodiment includes a central area, a first annular area, and a second annular area, the central area, the second annular area, and the first annular area are sequentially connected from the center to the periphery and are concentric to the center of the circle, and the center At least one of the region, the second annular region and the first annular region is an aspheric surface. For the structure of the multifocal contact lens in the seventh embodiment, please refer to FIG. 3 .

In the multifocal contact lens of the seventh embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the diopter of the central area is PowC. The maximum diopter of the annular zone is PowP1, and the maximum diopter of the second annular zone is PowP2, DiC, DiP1, DiP2, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, |PowC – PowP1| See Table 19 for the values of . Table 19, the seventh embodiment DiC (mm) 4.00 PowC (D) -3.00 DiP1 (mm) 15.00 PowP1 (D) -1.00 DiP2 (mm) 8.00 PowP2 (D) -2.00 DiC/DiP1 0.27 |PowC – PowP1| (D) 2.00 DiC/DiP2 0.50

Please refer to Table 20 and Fig. 13 at the same time. Table 20 lists the radius of the multifocal contact lens of the seventh embodiment and its corresponding diopter. Fig. 13 shows the radius and diopter of the multifocal contact lens of the seventh embodiment. Relation diagram of diopter (negative value only indicates the radius distance in the opposite direction), as can be seen from Table 20 and Figure 13, the diopter of the central area is fixed, the diopter of the second annular area is different from that of the central area, and the diopter of the first annular area is different from that of the central area. The diopter of the second annular area is different from that of the central area. Specifically, the diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases with distance from the central area. The diopter of the first annular area is greater than that of the central area. Diopter, and the diopter of the first annular zone increases progressively as it moves away from the central zone. Table 20, the seventh embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -7.50 -1.00 0.50 -3.00 -7.00 -1.14 1.00 -3.00 -6.50 -1.29 1.50 -3.00 -6.00 -1.43 2.00 -3.00 -5.50 -1.57 2.50 -2.75 -5.00 -1.71 3.00 -2.50 -4.50 -1.86 3.50 -2.25 -4.00 -2.00 4.00 -2.00 -3.50 -2.25 4.50 -1.86 -3.00 -2.50 5.00 -1.71 -2.50 -2.75 5.50 -1.57 -2.00 -3.00 6.00 -1.43 -1.50 -3.00 6.50 -1.29 -1.00 -3.00 7.00 -1.14 -0.50 -3.00 7.50 -1.00 0.00 -3.00

The material of the multifocal contact lens of the seventh embodiment is hydrogel. Please refer to Table 21A for the composition of the hydrogel of the seventh embodiment. Table 21A Element Content (wt%) Hydroxyethyl methacrylate 82 tetraphenyl dimethacrylate 1 Ethylene glycol dimethacrylate 0.4 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 13.5 Trimethylolpropane trimethacrylate 0.2 Methacrylate 2.3

It can be known from Table 21A that the multifocal contact lens of the seventh embodiment can absorb blue light by adding tetraphenyl dimethacrylic acid.

Please refer to Fig. 14, which is a graph showing the relationship between wavelength and light transmittance of the multifocal contact lens of the seventh embodiment and the multifocal contact lens of the third comparative example. The difference between the third comparative example and the seventh embodiment is The third comparative example did not add blue light absorbing components. Specifically, the third comparative example replaced tetraphenyl dimethacrylic acid with hydroxyethyl methacrylate. From Figure 14, it can be deduced that the third comparative example and the seventh embodiment The blocking rate of multifocal contact lenses for blue light (wavelength range 380nm~495nm) is calculated as follows: (1-average transmittance of wavelength 380~495nm)*100%, and the results are listed in Table 21B. Table 21B The third comparative example Seventh embodiment Blue light blocking rate (%) (380 nm ~ 495 nm) 8.21 35.53

It can be seen from Table 21B that compared with the third comparative example, the blue light blocking rate of the seventh embodiment is much higher than that of the third comparative example. In other words, the multifocal contact lens of the seventh embodiment can effectively absorb blue light, and then can Reduce the chance of retinal damage from blue light.

<Eighth embodiment>

The multifocal contact lens of the eighth embodiment includes a central area and a first annular area, the first annular area concentrically surrounds the central area, at least one of the central area and the first annular area is an aspheric surface, regarding the eighth embodiment Example of the structure of multifocal contact lenses can refer to Figure 2.

In the multifocal contact lens of the eighth embodiment, the diameter of the central area is DiC, the diameter of the outer circle of the first annular area is DiP1, the diopter of the central area is PowC, and the maximum diopter of the first annular area is PowP1. For the values of DiC, DiP1, DiC/DiP1, PowC, PowP1, |PowC - PowP1| of the eighth embodiment, please refer to Table 22. Table 22, the eighth embodiment DiC (mm) 5.00 PowC (D) -3.50 DiP1 (mm) 10.00 PowP1 (D) -1.75 DiC/DiP1 0.50 |PowC – PowP1| (D) 1.75

Please refer to Table 23 and Fig. 15 at the same time. Table 23 lists the radius of the multifocal contact lens of the eighth embodiment and its corresponding diopter. Fig. 15 shows the radius of the multifocal contact lens of the eighth embodiment. Diagram of the relationship between radius and diopter (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 23 and Figure 15, the diopter of the central area is fixed, and the diopter of the first annular area is different from that of the central area. In other words, the diopter of the first annular area is greater than that of the central area, and the diopter of the first annular area increases gradually as it moves away from the central area. Table 23, the eighth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -5.00 -1.75 0.50 -3.50 -4.50 -2.10 1.00 -3.50 -4.00 -2.45 1.50 -3.50 -3.50 -2.80 2.00 -3.50 -3.00 -3.15 2.50 -3.50 -2.50 -3.50 3.00 -3.15 -2.00 -3.50 3.50 -2.80 -1.50 -3.50 4.00 -2.45 -1.00 -3.50 4.50 -2.10 -0.50 -3.50 5.00 -1.75 0.00 -3.50

The material of the multifocal contact lens in the eighth embodiment is hydrogel. For the composition of the hydrogel in the eighth embodiment, please refer to Table 24. Table twenty-four Element Content (wt%) Hydroxyethyl methacrylate 45 tetraphenyl dimethacrylate 1 Ethylene glycol dimethacrylate 0.5 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 10.6 Trimethylolpropane trimethacrylate 0.3 2-Methyl-2-propenoic acid-2,3-dihydroxypropyl ester 42

It can be known from Table 24 that the multifocal contact lens of the eighth embodiment can absorb blue light by adding tetraphenyl dimethacrylic acid.

<Ninth embodiment>

The multifocal contact lens of the ninth embodiment comprises a central area, a first annular area and a second annular area, the central area, the second annular area, and the first annular area are sequentially connected from the center to the periphery and concentric with the center of the circle, and the center At least one of the region, the second annular region and the first annular region is an aspheric surface. For the structure of the multifocal contact lens in the ninth embodiment, please refer to FIG. 3 .

In the multifocal contact lens of the ninth embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the diopter of the central area is PowC. The maximum diopter of the annular area is PowP1, and the maximum diopter of the second annular area is PowP2, DiC, DiP1, DiP2, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, |PowC – PowP1| Please refer to Table 25 for the values of . Table 25, the ninth embodiment DiC (mm) 6.00 PowC (D) -4.00 DiP1 (mm) 14.00 PowP1 (D) -3.25 DiP2 (mm) 10.00 PowP2 (D) -3.75 DiC/DiP1 0.43 |PowC – PowP1| (D) 0.75 DiC/DiP2 0.60

Please refer to Table 26 and Figure 16 at the same time. Table 26 lists the radius of the multifocal contact lens of the ninth embodiment and its corresponding diopter, and Figure 16 is the radius of the multifocal contact lens of the ninth embodiment. The relationship between radius and diopter (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 26 and Figure 16, the diopter of the central area is fixed, and the diopter of the second annular area is different from that of the central area. The diopter of the annular area is different from that of the central area. Specifically, the diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases as it moves away from the central area. The diopter of the first annular area is greater than that of the central area. The diopter of the central zone, and the diopter of the first annular zone increases with distance from the central zone. Table 26, the ninth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -7.00 -3.25 0.50 -4.00 -6.50 -3.38 1.00 -4.00 -6.00 -3.50 1.50 -4.00 -5.50 -3.63 2.00 -4.00 -5.00 -3.75 2.50 -4.00 -4.50 -3.81 3.00 -4.00 -4.00 -3.88 3.50 -3.94 -3.50 -3.94 4.00 -3.88 -3.00 -4.00 4.50 -3.81 -2.50 -4.00 5.00 -3.75 -2.00 -4.00 5.50 -3.63 -1.50 -4.00 6.00 -3.50 -1.00 -4.00 6.50 -3.38 -0.50 -4.00 7.00 -3.25 0.00 -4.00

The material of the multifocal contact lens in the ninth embodiment is water gel. Please refer to Table 27 for the composition of the water gel in the ninth embodiment. Table 27 Element Content (wt%) Hydroxyethyl methacrylate 90.3 tetraphenyl dimethacrylate 1.2 Ethylene glycol dimethacrylate 0.6 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 glycerin 6.5 N-vinyl-2-pyrrolone 0.8

It can be seen from Table 27 that the multifocal contact lens of the ninth embodiment can absorb blue light by adding tetraphenyl dimethacrylic acid.

<Tenth Embodiment>

The multifocal contact lens of the tenth embodiment includes a central area and a first annular area, the first annular area concentrically surrounds the central area, at least one of the central area and the first annular area is an aspheric surface, regarding the tenth embodiment Example of the structure of multifocal contact lenses can refer to Figure 2.

In the multifocal contact lens of the tenth embodiment, the diameter of the central area is DiC, the diameter of the outer circle of the first annular area is DiP1, the diopter of the central area is PowC, and the maximum diopter of the first annular area is PowP1. For the values of DiC, DiP1, DiC/DiP1, PowC, PowP1, |PowC - PowP1| of the tenth embodiment, please refer to Table 28. Table 28, the tenth embodiment DiC (mm) 7.00 PowC (D) -4.50 DiP1 (mm) 12.00 PowP1 (D) -3.00 DiC/DiP1 0.58 |PowC – PowP1| (D) 1.50

Please refer to Table 29 and Fig. 17 at the same time. Table 29 lists the radius of the multifocal contact lens of the tenth embodiment and its corresponding diopter, and Fig. 17 shows the radius of the multifocal contact lens of the tenth embodiment. The relationship between radius and diopter (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 29 and Figure 17, the diopter of the central area is fixed, and the diopter of the first annular area is different from that of the central area. In other words, the diopter of the first annular area is greater than that of the central area, and the diopter of the first annular area increases gradually as it moves away from the central area. Table 29, the tenth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -6.00 -3.00 0.50 -4.50 -5.50 -3.30 1.00 -4.50 -5.00 -3.60 1.50 -4.50 -4.50 -3.90 2.00 -4.50 -4.00 -4.20 2.50 -4.50 -3.50 -4.50 3.00 -4.50 -3.00 -4.50 3.50 -4.50 -2.50 -4.50 4.00 -4.20 -2.00 -4.50 4.50 -3.90 -1.50 -4.50 5.00 -3.60 -1.00 -4.50 5.50 -3.30 -0.50 -4.50 6.00 -3.00 0.00 -4.50

The material of the multifocal contact lens of the tenth embodiment is silicon hydrogel. Please refer to Table 30 for the composition of the silicon hydrogel of the tenth embodiment. Table Thirty Element Content (wt%) Hydroxyethyl methacrylate 4.3 Methacryloxypropyltris(trimethylsiloxane)silane 28 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 N-vinyl-2-pyrrolone 20.2 N,N-Dimethacrylamide 12.3 Ethylene glycol dimethacrylate 0.6 2-(4-Benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate 1 (3-Methacryloxy-2-hydroxypropoxy)propylbis(trimethylsilyloxy)methyl 21.5 Isopropanol 10 Methacrylate 1.5

As can be seen from Table 30, by adding 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate, the multifocal contact lens of the tenth embodiment can absorb UV light.

<Eleventh embodiment>

The multifocal contact lens of the eleventh embodiment includes a central area, a first annular area, and a second annular area, and the central area, the second annular area, and the first annular area are sequentially connected from the center to the periphery and concentric with the center of the circle, At least one of the central area, the second annular area and the first annular area is an aspheric surface. For the structure of the multifocal contact lens in the eleventh embodiment, please refer to FIG. 3 .

In the multifocal contact lens of the eleventh embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the diopter of the central area is PowC. The maximum diopter of the first annular area is PowP1, and the maximum diopter of the second annular area is PowP2. DiC, DiP1, DiP2, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, |PowC of the eleventh embodiment – See Table 31 for the value of PowP1|. Table 31, the eleventh embodiment DiC (mm) 8.00 PowC (D) -5.00 DiP1 (mm) 13.00 PowP1 (D) -2.75 DiP2 (mm) 10.00 PowP2 (D) -4.00 DiC/DiP1 0.62 |PowC – PowP1| (D) 2.25 DiC/DiP2 0.80

Please refer to Table 32 and Figure 18 at the same time. Table 32 lists the radius of the multifocal contact lens of the eleventh embodiment and its corresponding diopter. Figure 18 is the multifocal contact lens of the eleventh embodiment. The relationship between the radius and the diopter of the glasses (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 32 and Figure 18, the diopter of the central area is fixed, and the diopter of the second annular area is different from that of the central area. The diopter of the first annular area is different from that of the central area. Specifically, the diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases progressively as it moves away from the central area. The diopter of the first annular area The diopter is greater than the diopter of the central area, and the diopter of the first annular area increases progressively as it gets away from the central area. Table 32. Embodiment 11 Radius (mm) Diopter (D) Radius (mm) Diopter (D) -6.50 -2.75 0.50 -5.00 -6.00 -3.17 1.00 -5.00 -5.50 -3.58 1.50 -5.00 -5.00 -4.00 2.00 -5.00 -4.50 -4.50 2.50 -5.00 -4.00 -5.00 3.00 -5.00 -3.50 -5.00 3.50 -5.00 -3.00 -5.00 4.00 -5.00 -2.50 -5.00 4.50 -4.50 -2.00 -5.00 5.00 -4.00 -1.50 -5.00 5.50 -3.58 -1.00 -5.00 6.00 -3.17 -0.50 -5.00 6.50 -2.75 0.00 -5.00

The material of the multifocal contact lens of the eleventh embodiment is silicon hydrogel. Please refer to Table 33A for the composition of the silicon hydrogel of the eleventh embodiment. Table 33A Element Content (wt%) Hydroxyethyl methacrylate 4 Methacryloxypropyltris(trimethylsiloxane)silane 28 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 N-vinyl-2-pyrrolone 20.5 N,N-Dimethacrylamide 12.3 Ethylene glycol dimethacrylate 0.5 2-(4-Benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate 1.1 3-Acetyloxy-2-hydroxypropoxypropyl terminated polydimethylsiloxane twenty two n-Hexanol 11

It can be seen from Table 33A that the multifocal contact lens of the eleventh embodiment can absorb UV light by adding 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate.

Please refer to Fig. 19, which is a relationship diagram between the wavelength and the light transmittance of the multifocal contact lens of the eleventh embodiment and the multifocal contact lens of the fourth comparative example, the fourth comparative example and the eleventh embodiment The difference is that the fourth comparative example does not add UV absorbing components, specifically, the fourth comparative example replaces 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate with hydroxyethyl methacrylate , can deduce the cut-off rate of the multifocal contact lens of the 4th comparative example and the 11th embodiment for UV-A (the UV light of wavelength range 316nm～380nm) by Fig. 19, calculation method is as follows: (1-wavelength 316 The average transmittance of ~380nm)*100%, and the blocking rate of the multifocal contact lenses of the fourth comparative example and the eleventh embodiment for UV-B (UV light with a wavelength range of 280nm~315nm), the calculation method is as follows: (average transmittance of 1-280nm~315nm) × 100%, and the results are listed in Table 33B. Table 33B Fourth comparative example Eleventh embodiment UV-A blocking rate (%) (316 nm ~380 nm) 15.02 90.01 UV-B blocking rate (%) (280 nm ~315 nm) 40.91 99.24

It can be seen from Table 33B that compared with the fourth comparative example, the blocking rate of the eleventh embodiment to UV-A and UV-B is much higher than that of the fourth comparative example, in other words, the eleventh embodiment The multifocal contact lenses can effectively absorb UV light, thereby reducing the chance of retinal damage from UV light.

<Twelfth embodiment>

The multifocal contact lens of the twelfth embodiment comprises a central area, a first annular area, a second annular area and a third annular area, the central area, the third annular area, the second annular area, and the first annular area consist of The center to the periphery are connected in sequence and are the same as the center of the circle. At least one of the central area, the third annular area, the second annular area and the first annular area is aspheric. For the structure of the multifocal contact lens in the twelfth embodiment, please refer to Figure 4.

In the multifocal contact lens of the twelfth embodiment, the diameter of the central area is DiC, the outer diameter of the first annular area is DiP1, the outer diameter of the second annular area is DiP2, and the outer diameter of the third annular area is DiP2. is DiP3, the diopter of the central area is PowC, the maximum diopter of the first annular area is PowP1, the maximum diopter of the second annular area is PowP2, and the maximum diopter of the third annular area is PowP3. Regarding the DiC of the twelfth embodiment, For the values of DiP1, DiP2, DiP3, DiC/DiP1, DiC/DiP2, PowC, PowP1, PowP2, PowP3, |PowC – PowP1|, please refer to Table 34. Table 34, the twelfth embodiment DiC (mm) 4.00 PowC (D) -5.50 DiP1 (mm) 16.00 PowP1 (D) -3.00 DiP2 (mm) 12.00 PowP2 (D) -3.00 DiP3 (mm) 8.00 PowP3 (D) -3.75 DiC/DiP1 0.25 |PowC – PowP1| (D) 2.50 DiC/DiP2 0.33

Please refer to Table 35 and Figure 20 at the same time. Table 35 lists the radius of the multifocal contact lens of the twelfth embodiment and its corresponding diopter. Figure 20 is the multifocal contact lens of the twelfth embodiment. The relationship between the radius and the diopter of the glasses (the negative value only indicates the radius distance in the opposite direction), as can be seen from Table 35 and Figure 20, the diopter of the central area is fixed, and the diopter of the third ring area is different from that of the central area. The diopter of the second annular area is different from that of the central area, the diopter of the first annular area is different from that of the central area, specifically, the diopter of the third annular area is greater than that of the central area, and the diopter of the third annular area The diopter of the second annular area is greater than that of the central area, and the diopter of the second annular area increases as it moves away from the central area, the diopter of the first annular area is greater than that of the central area, and the diopter of the first annular area The diopter of the shaped area is fixed. Table 35, the twelfth embodiment Radius (mm) Diopter (D) Radius (mm) Diopter (D) -8.00 -3.00 0.50 -5.50 -7.50 -3.00 1.00 -5.50 -7.00 -3.00 1.50 -5.50 -6.50 -3.00 2.00 -5.50 -6.00 -3.00 2.50 -5.06 -5.50 -3.19 3.00 -4.63 -5.00 -3.38 3.50 -4.19 -4.50 -3.56 4.00 -3.75 -4.00 -3.75 4.50 -3.56 -3.50 -4.19 5.00 -3.38 -3.00 -4.63 5.50 -3.19 -2.50 -5.06 6.00 -3.00 -2.00 -5.50 6.50 -3.00 -1.50 -5.50 7.00 -3.00 -1.00 -5.50 7.50 -3.00 -0.50 -5.50 8.00 -3.00 0.00 -5.50

The material of the multifocal contact lens in the twelfth embodiment is silicon hydrogel. For the composition of the hydrogel in the twelfth embodiment, please refer to Table 36A. Table 36A Element Content (wt%) Hydroxyethyl methacrylate 4.2 Methacryloxypropyltris(trimethylsiloxane)silane 26 2-Hydroxy-2-methyl-1-phenyl-1-propanone 0.6 N-vinyl-2-pyrrolone 20 N,N-Dimethacrylamide 11 Dimethicone modified urethane oligomer twenty four tetraphenyl dimethacrylate 1 Methyl methacrylate 4.2 ethanol 9

It can be known from Table 36A that the multifocal contact lens of the twelfth embodiment can absorb blue light by adding tetraphenyl dimethacrylic acid.

Please refer to Fig. 21, which is a relationship diagram between wavelength and light transmittance of the multifocal contact lens of the twelfth embodiment and the multifocal contact lens of the fifth comparative example, the fifth comparative example and the twelfth embodiment The difference is that the fifth comparative example did not add blue light absorbing components. Specifically, the fifth comparative example replaced tetraphenyl dimethacrylate with hydroxyethyl methacrylate. From Figure 21, it can be inferred that the fifth comparative example and the tenth comparative example The blocking rate of the multifocal contact lens of the second embodiment for blue light (wavelength range 380nm~495nm) is calculated as follows: (1-average transmittance rate of wavelength 380~495nm)*100%, and the results are listed in Table 30 six b. Table 36B Fifth comparative example Twelfth embodiment Blue light blocking rate (%) (380 nm ~ 495 nm) 10.31 16.32

It can be seen from Table 36B that compared with the fifth comparative example, the blue light blocking rate of the twelfth embodiment is much higher than that of the fifth comparative example. In other words, the multifocal contact lens of the twelfth embodiment can effectively absorb blue light. In turn, it can reduce the chance of retinal damage from blue light.

The aspherical surface on the multifocal contact lens in the present invention refers to the curved surface shape of the front surface or the back surface under the transcentric section, wherein the front surface refers to the surface away from the cornea of the eyeball, and the back surface refers to the surface close to the cornea of the eyeball.

The diopter in the present invention is represented by D value, when the diopter of the lens for correcting myopia is a negative value, the diopter of a lens for correcting hyperopia is a positive value.

Cycloplegic agents in the present invention include but are not limited to atropine (Atropine; (3-endo)-8-Methyl-8-azabicyclo[3.2.1]oct-3-yl tropate), tropicamide (Tropicamide; N-Ethyl-3-hydroxy-2-phenyl-N-(4-pyridinylmethyl)propanamide), cyclopentolamine ester (Cyclopentolate; 2-(Dimethylamino)ethyl (1-hydroxycyclopentyl)(phenyl)acetate), homatolate Products (Homatropine; (3-endo)-8-Methyl-8-azabicyclo[3.2.1]oct-3-yl hydroxy(phenyl)acetate), Scopolamine (Scopolamine; (1R,2R,4S,5S,7s)- 9-Methyl-3-oxa-9-azatricyclo[3.3.1.0 ^2,4 ]non-7-yl(2S)-3-hydroxy-2-phenylpropanoate) and Eucatropine (Eucatropine; 1,2,2, 6-Tetramethyl-4-piperidinyl hydroxy(phenyl) acetate) and salts of the aforementioned substances. Cycloplegics, also known as mydriatics, belong to parasympathetic blockers, that is, a non-selective M-type muscarinic receptor blocker, which can block muscarinic receptors Paralyzes and relaxes the cyclone muscles that control the pupils, causing the pupils to dilate.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be defined by the scope of the appended patent application.

100:Contact lens products 110,210,310: multifocal contact lenses 111,211,311: central area 112,212,312: 1st circular area 120: buffer solution 213,313:Second circular area 314: The third circular area DiC: diameter of the central zone DiP1: Outer circle diameter of the first annular zone DiP2: Outer circle diameter of the second annular zone DiP3: The diameter of the outer circle of the third annular zone PowC: the diopter of the central area PowP1: the maximum diopter of the first annular zone PowP2: the maximum diopter of the second annular zone PowP3: the maximum diopter of the third annular zone

In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious and understandable, the accompanying drawings are described as follows: FIG. 1 shows a schematic diagram of a contact lens product according to an embodiment of the present invention; Figure 2 shows a schematic plan view of the multifocal contact lens in Figure 1; FIG. 3 shows a schematic plan view of a multifocal contact lens according to another embodiment of the present invention; FIG. 4 shows a schematic plan view of a multifocal contact lens according to yet another embodiment of the present invention; The 5th figure is the relation diagram of the radius and diopter of the multifocal contact lens of the first embodiment; The 6th figure is the relation diagram of the radius and diopter of the multifocal contact lens of the second embodiment; The 7th figure is the relationship figure of wavelength and light transmittance of the multifocal contact lens of the second embodiment and the multifocal contact lens of the first comparative example; The 8th figure is the relation diagram of the radius and the diopter of the multifocal contact lens of the third embodiment; The 9th figure is the relation diagram of the radius and diopter of the multifocal contact lens of the fourth embodiment; Fig. 10 is a relationship diagram between wavelength and light transmittance of the multifocal contact lens of the fourth embodiment and the multifocal contact lens of the second comparative example; Fig. 11 is the relation figure of the radius and diopter of the multifocal contact lens of the fifth embodiment; Fig. 12 is a relation diagram of the radius and the diopter of the multifocal contact lens of the sixth embodiment; Fig. 13 is a relationship diagram between the radius and the diopter of the multifocal contact lens of the seventh embodiment; Fig. 14 is a relationship diagram between wavelength and light transmittance of the multifocal contact lens of the seventh embodiment and the multifocal contact lens of the third comparative example; Fig. 15 is a relation diagram of the radius and the diopter of the multifocal contact lens of the eighth embodiment; The 16th figure is the relation diagram of the radius and diopter of the multifocal contact lens of the ninth embodiment; Fig. 17 is a relationship diagram between radius and diopter of the multifocal contact lens of the tenth embodiment; Fig. 18 is a relation diagram of radius and diopter of the multifocal contact lens of the eleventh embodiment; Fig. 19 is a relationship diagram between wavelength and light transmittance of the multifocal contact lens of the eleventh embodiment and the multifocal contact lens of the fourth comparative example; Fig. 20 is a relationship diagram between radius and diopter of the multifocal contact lens of the twelfth embodiment; and Fig. 21 is a graph showing the relationship between wavelength and light transmittance of the multifocal contact lens of the twelfth embodiment and the multifocal contact lens of the fifth comparative example.

100:Contact lens products

110:Multifocal Contact Lenses

120: buffer solution

Claims (12)

A contact lens product comprising: A multifocal contact lens, comprising: a central area; and a first annular region surrounding the central region, the first annular region having a different diopter than the central region; Wherein, the composition for preparing the multifocal contact lens comprises 10% to 96% of hydroxyethyl methacrylate; and a buffer solution, the multifocal contact lens is soaked in the buffer solution; Wherein, the diopter of the central area of the multifocal contact lens is PowC, the maximum diopter of the first annular area of the multifocal contact lens is PowP1, the diameter of the central area of the multifocal contact lens is DiC, and the multifocal contact lens The outer diameter of the first annular zone of the focal contact lens is DiP1, which satisfies the following conditions: 2.25 D ≤ PowP1 – PowC; DiC ≤ 5 mm; and 0.43 ≤ DiC/DiP1 ≤ 1. The contact lens product as described in claim 1, wherein the diameter of the central zone of the multifocal contact lens is DiC, and the outer diameter of the first annular zone of the multifocal contact lens is DiP1, which meets the following conditions: 0.43 ≤ DiC/DiP1 ≤ 0.64. The contact lens product as described in claim 2, wherein the diameter of the central zone of the multifocal contact lens is DiC, and the outer diameter of the first annular zone of the multifocal contact lens is DiP1, which meets the following conditions: 0.50 ≤ DiC/DiP1 ≤ 0.64. The contact lens product as described in claim 2, wherein the outer diameter of the first annular zone of the multifocal contact lens is DiP1, which satisfies the following conditions: DiP1 ≤ 12 mm. The contact lens product according to claim 1, wherein the composition for preparing the multifocal contact lens comprises 40% to 96% of hydroxyethyl methacrylate. The contact lens product according to claim 5, wherein the composition for preparing the multifocal contact lens comprises 0.01%-5% methacrylic acid. The contact lens product according to claim 6, wherein the composition for preparing the multifocal contact lens comprises 0.1%-2% methacrylic acid. The contact lens product as described in Claim 5, wherein the composition for preparing the multifocal contact lens includes UV (Ultraviolet) absorbing components. The contact lens product according to claim 8, wherein the composition for preparing the multifocal contact lens comprises a blue light absorbing component. The contact lens product according to claim 1, wherein the buffer solution contains a cycloplegic agent. The contact lens product as described in claim item 10, wherein the weight percent concentration of the cycloplegic agent in the buffer solution is ConA, which meets the following conditions: 0.01% ≤ ConA < 0.5%. The contact lens product as described in claim item 11, wherein the weight percent concentration of the cycloplegic agent in the buffer solution is ConA, which meets the following conditions: 0.1% ≤ ConA < 0.5%.

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