TWI827339B - Myopia control contact lenses for children - Google Patents

Abstract

A children's myopia control contact lens includes a first optical zone including a first refractive power, a second optical zone including a second refractive power, a third optical zone including a third refractive power, and a third optical zone including a third refractive power. a fourth optical zone of fourth refractive power and a fifth optical zone including a fifth refractive power, the difference between the first refractive power and a corrected refractive power is a first difference, and the second refractive power and the The difference in corrected refractive power is a second difference greater than the first difference, the difference between the third refractive power and the corrected refractive power is a third difference greater than the second difference, and the fourth The difference between the refractive power and the corrected refractive power is a fourth difference less than the third difference, and the difference between the fifth refractive power and the corrected refractive power is a fifth difference less than the fourth difference. , which can prevent users from having difficulty adapting.

Description

Myopia control contact lenses for children

The present invention relates to a contact lens, in particular to a children's myopia control contact lens.

An existing optical lens for vision correction, as shown in the Republic of China invention patent I636296, allows the human eye's visual imaging system to form a visual imaging correction area that falls on the front and rear areas of the retina through the fusion of the diopters of the two areas. When the eye is in It can be directly adjusted when looking far or near, thereby reducing the compression and deformation of the ciliary muscle and lens due to changes in looking far or near, thereby reducing eye fatigue and reducing the progression of myopia.

Although the optical lens for vision correction has clinically achieved a certain effect in preventing the progression of myopia, due to the excessive change in diopter in adjacent areas of the optical lens for vision correction, it is still difficult for some users to adapt and the comfort level is not high. good, so there is a need for further improvement.

In addition, clinical tests have found that it is impossible to use the same correction solution to prevent the progression of myopia with different corrected refractive powers, especially the lower or higher the corrected refractive power, the more obvious it is.

Therefore, an object of the present invention is to provide a children's myopia control contact lens that overcomes the shortcomings of the prior art.

Therefore, the children's myopia control contact lens of the present invention is used to generate a corrective diopter that can correct myopia. The children's myopia control contact lens includes a first optical zone, a second optical zone, a third optical zone, and a fourth optical zone. optical zone, and a fifth optical zone.

Define a central origin. The range of the first optical zone is within a diameter of 0.5mm±0.05mm surrounding the central origin and with the central origin as the center. The first optical zone includes a jointly formed first Diopter, the difference between the first diopter and the corrected diopter is a first difference, the second optical zone surrounds the first optical zone, and the range of the second optical zone is between the first Within the range of 1 mm ± 0.05 mm in diameter outside the optical zone and centered on the central origin, the second optical zone includes a jointly formed second refractive power, and the difference between the second refractive power and the corrected refractive power is A second difference, the third optical zone surrounds the second optical zone, and the range of the third optical zone is a diameter of 1.5mm±0.05 that is outside the second optical zone and centered on the central origin. Within the range of mm, the third optical zone includes a jointly formed third refractive power, the difference between the third refractive power and the corrected refractive power is a third difference, and the fourth optical zone surrounds the third Outside the optical zone, the range of the fourth optical zone is within a range of ±0.05mm with a diameter of 2 mm outside the third optical zone and with the central origin as the center. The fourth optical zone includes a jointly formed fourth optical zone. Diopter, the difference between the fourth diopter and the corrected diopter is a fourth difference, the fifth optical zone surrounds the fourth optical zone, and the range of the fifth optical zone is between the fourth Within the range of 3.5 mm ± 0.25 mm in diameter outside the optical zone and centered on the central origin, the fifth optical zone includes a jointly formed fifth refractive power, and the difference between the fifth refractive power and the corrected refractive power is a fifth difference.

The first refractive power, the second refractive power, the third refractive power, the fourth refractive power and the fifth refractive power together form the corrected refractive power, the second difference is greater than the first difference, and the third Three differences are greater than the second difference, the fourth difference is less than the third difference, and the fifth difference is less than the fourth difference. When the corrected diopter changes from 100 to 800, the first difference The value shows a trend from large to small and then becomes larger. The second difference value shows a trend from large to small and then becomes larger. The third difference value shows a trend from small to large and then becomes smaller. The fourth difference value shows a trend from small to large and then becomes smaller again. The fifth difference value shows a trend from small to large and then becomes smaller again, and the fifth difference value shows a trend from large to small and then becomes larger again.

The effect of the present invention is: by setting the first optical zone, the second optical zone, the third optical zone and the fourth optical zone, and making the second difference larger than the first difference, the third optical zone The difference is greater than the second difference, the fourth difference is less than the third difference, and the fifth difference is less than the fourth difference, which can avoid difficulty for the user to adapt and increase wearing comfort.

Referring to Figures 1, 2, and 3, an embodiment of the children's myopia control contact lens of the present invention is used to generate a corrective refractive power that can correct myopia. The children's myopia control contact lens includes a first optical zone 2 and a second optical zone 2. Zone 3, a third optical zone 4, a fourth optical zone 5, and a fifth optical zone 6. The aforementioned contact lens is used to produce a corrective refractive power for correcting myopia. It is formed in a concave lens type and is suitable for being worn on the user's eyes. It should be noted that the refractive power mentioned in this embodiment is not a concave lens type. The negative value type is represented by the state, and the refractive power mentioned is expressed in the positive value type.

The contact lens defines a central origin C, and the range of the first optical zone 2 is within a range of 0.5 mm ± 0.05 mm in diameter surrounding the central origin C and with the central origin C as the center. 2 includes a first refractive power formed by the fusion of a plurality of refractive power parts, and the difference between the first refractive power and the corrected refractive power is a first difference value. In this embodiment, the diameter of the first optical zone 2 surrounding the central origin C is 0.5 mm. However, due to factors such as different sizes of human eyeballs or differences in visual range, the first optical zone 2 can be adjusted without affecting the use effect. Optical zone 2 can be fine-tuned between 0.45mm and 0.55mm.

The second optical zone 3 surrounds the first optical zone 2. The range of the second optical zone 3 is 1 mm ± 0.05 mm in diameter outside the first optical zone 2 and with the center origin C as the center. Within the scope, the second optical zone 3 includes a second refractive power formed by the fusion of a plurality of refractive power parts, and the difference between the second refractive power and the corrected refractive power is a second difference. In this embodiment, the second optical zone 3 has a diameter of 1 mm around the central origin C. However, due to factors such as different sizes of human eyeballs or differences in visual range, the second optical zone 3 can be adjusted without affecting the use effect. Zone 3 can be fine-tuned between 0.95mm and 1.05mm.

The third optical zone 4 surrounds the second optical zone 3, and the range of the third optical zone 4 is a diameter of 1.5mm±0.05mm outside the second optical zone 3 with the center origin C as the center. Within the range, the third optical zone 4 includes a third refractive power formed by the fusion of a plurality of refractive power parts, and the difference between the third refractive power and the corrected refractive power is a third difference value. In this embodiment, the third optical zone 4 has a diameter of 1.5 mm surrounding the central origin C. However, due to factors such as different sizes of human eyeballs or differences in visual range, the third optical zone 4 can be adjusted without affecting the use effect. Optical zone 4 can be fine-tuned between 1.45mm and 1.55mm.

The fourth optical zone 5 surrounds the third optical zone 4 , and the range of the fourth optical zone 5 is 2 mm ± 0.05 mm in diameter between the outside of the third optical zone 4 and the center origin C as the center. Within the range, the fourth optical zone 5 includes a fourth refractive power formed by the fusion of a plurality of refractive power parts, and the difference between the fourth refractive power and the corrected refractive power is a fourth difference. In this embodiment, the fourth optical zone 5 has a diameter of 2 mm around the central origin C. However, due to factors such as different sizes of human eyeballs or differences in visual range, the fourth optical zone 5 can be adjusted without affecting the use effect. Zone 5 can be fine-tuned between 1.95mm and 2.05mm.

The fifth optical zone 6 surrounds the fourth optical zone 5, and the scope of the fifth optical zone 6 is a diameter of 3.5mm±0.25mm outside the fourth optical zone 5 and with the center origin C as the center. Within the range, the fifth optical zone 6 includes a fifth refractive power formed by the fusion of a plurality of refractive power parts, and the difference between the fifth refractive power and the corrected refractive power is a fifth difference value. In this embodiment, the fifth optical zone has a diameter of 3.5 mm surrounding the central origin C. However, due to factors such as different sizes of human eyeballs or differences in visual range, without affecting the use effect, the fourth optical zone Zone 5 can be fine-tuned between 3.25mm and 3.75mm.

The refractive power locations of the first optical zone 2 , the refractive power locations of the second optical zone 3 , the refractive power locations of the third optical zone 4 , the refractive power locations of the fourth optical zone 5 and the third optical zone 5 The refractive power parts of the five optical zones 6 are fused to form the corrected refractive power, the second difference is greater than the first difference, the third difference is greater than the second difference, and the fourth difference is less than the third difference value, the fifth difference is smaller than the fourth difference.

When the corrected diopter changes from 100 degrees to 800 degrees, the first difference shows a trend from large to small and then becomes larger, the second difference shows a trend from large to small and then becomes larger, and the third difference shows a trend from large to small and then becomes larger. The value shows a trend from small to large and then becomes smaller, the fourth difference value shows a trend from small to large and then becomes smaller, and the fifth difference value shows a trend from large to small and then becomes larger.

When the corrected refractive power falls within the range of 400 degrees to 500 degrees, the first difference changes to the minimum value, the second difference changes to the minimum value, the third difference changes to the maximum value, and the fourth difference changes to the minimum value. The value changes to the maximum value, and the fifth difference value changes to the minimum value.

Referring to Table 1, in this embodiment, the refractive power parts of the first optical zone 2 are distributed within the range of the first optical zone 2, and the refractive power of the refractive power parts is between 47.5 degrees and 772.5 degrees. The refractive power parts of the second optical zone 3 are distributed within the range of the second optical zone 3, and the refractive power of the refractive power parts is between 72.5 degrees and 812.5 degrees. The third optical zone 4 The refractive power parts of are distributed within the scope of the third optical zone 4, and the refractive power of the refractive power parts is between 102.5 degrees and 832.5 degrees. The refractive power parts of the fourth optical zone 5 are distributed in Within the scope of the fourth optical zone 5 , and the refractive power of the refractive power parts is between 92.5 degrees and 813.5 degrees, the refractive power parts of the fifth optical zone 6 are distributed within the range of the fifth optical zone 6 Within, and the diopter of these diopter parts is between 82.5 degrees and 811.5 degrees.

Table 1. Diopter distribution table first optical zone Second optical zone Corrected refraction (degrees) First difference (degree) First diopter (degree) Diopter range of the first optical zone (degrees) Second difference (degrees) Second diopter (degree) Second optical zone diopter range (degrees) 100 -40 60 47.5~72.5 -10 90 72.5~102.5 200 -50 150 137.5~162.5 -15 185 162.5~197.5 300 -75 225 212.5~237.5 -25 275 237.5~287.5 400 -95 305 292.5~317.5 -50 350 317.5~362.5 500 -95 405 392.5~417.5 -50 450 417.5~462.5 600 -75 525 512.5~537.5 -25 575 537.5~587.5 700 -50 650 637.5~662.5 -12 688 662.5~700.5 800 -40 760 747.5~772.5 0 800 772.5~812.5 third optical zone Fourth optical zone Corrected refraction (degrees) Third difference (degree) The third diopter (degree) Diopter range of the third optical zone (degrees) Fourth difference (degrees) Fourth zone luminosity (degrees) Diopter range of the fourth optical zone (degrees) 100 20 120 102.5~132.5 5 105 92.5~117.5 200 50 250 197.5~262.5 6 206 193.5~218.5 300 55 355 287.5~367.5 9 309 296.5~321.5 400 60 460 362.5~472.5 12 412 399.5~424.5 500 60 560 462.5~572.5 12 512 499.5~524.5 600 55 655 587.5~667.5 9 609 596.5~621.5 700 50 750 700.5~762.5 6 706 693.5~718.5 800 20 820 812.5~832.5 1 801 788.5~813.5 Fifth optical zone Corrected refraction (degrees) Fifth difference (degrees) Fifth diopter (degree) Diopter range of the fifth optical zone (degrees) 100 -5 95 82.5~107.5 200 -6 194 181.5~206.5 300 -3 297 284.5~309.5 400 -12 388 375.5~400.5 500 -12 488 474.5~499.5 600 -12 588 575.5~600.5 700 -9 691 678.5~703.5 800 -1 799 786.5~811.5

The first difference is between -95 degrees ~ -40 degrees, the second difference is between -50 degrees ~ 0 degrees, and the third difference is between 20 degrees ~ 60 degrees , the fourth difference value is between 1 degree and 12 degrees, and the fifth difference value is between -12 degrees and -1 degrees.

In order to simplify the description, only when the corrected refractive power is substantially 100 degrees will be described below. For other corrected refractive powers, the refractive power distribution can be referred to other parts in Table 1.

When the corrected refractive power is substantially 100, the first refractive power is substantially 60 degrees, the first difference is -40 degrees, and the refractive powers of the refractive power parts of the first optical zone 2 are between 47.5 degrees and Between 72.5 degrees, the second refractive power is essentially 90 degrees, and the second difference is -10 degrees. The refractive power of the refractive power parts of the second optical zone 3 is between 72.5 degrees and 102.5 degrees. The three refractive powers are essentially 120 degrees, the third difference is 20 degrees, the refractive powers of the refractive power parts of the third optical zone 4 are between 102.5 degrees and 132.5 degrees, and the fourth refractive power is actually 105 degrees. , the fourth difference is 5 degrees, the refractive power of the refractive power parts of the fourth optical zone 5 is between 92.5 degrees and 117.5 degrees, the fifth refractive power is essentially 95 degrees, and the fifth difference is -5 degrees, the refractive power of the refractive power parts of the fifth optical zone 6 is between 82.5 degrees and 107.5 degrees.

Since the first difference, the second difference, the third difference, the fourth difference to the fifth difference have a gradually increasing to decreasing trend, and are not greater than 100 degrees, the The refractive power of any two adjacent ones of the first optical zone 2, the second optical zone 3, the third optical zone 4, the fourth optical zone 5 and the fifth optical zone 6 will not change drastically, And the refractive power is close to the corrected refractive power, so it can avoid the problem of difficulty for users to adapt.

The invention was further verified. The applicant entrusted National Taiwan University Hospital and Taipei Tzu Chi Hospital to conduct clinical tests. The effective number of testers was 72. The age of the testers ranged from 9 to 15 years old. A 52-week test observation was carried out, in which The test subject wore the children's myopia control contact lens on one eye and a regular contact lens on the other eye. In the test results, the average spherical equivalent refractive error (SER) of the eyes wearing the children's myopia control contact lenses was 70 degrees ± 49 degrees, and the average axial length, AXL) is 0.34mm±0.19mm, and the change in corrected refractive power corresponding to the average spherical equivalent refraction of eyes wearing general contact lenses is 88 degrees±51 degrees, and the average axial length is 0.38mm±0.19mm, so It can be seen that the average axial length and myopia progression of eyes wearing the children's myopia control contact lenses are reduced by 10.5% and 20.5% respectively compared with the eyes wearing ordinary contact lenses. Therefore, it can be known that the children's myopia control contact lenses are indeed effective.

To sum up, by setting the first optical zone 2, the second optical zone 3, the third optical zone 4 and the fourth optical zone 5, and making the second difference larger than the first difference, The third difference is greater than the second difference, the fourth difference is less than the third difference, and the fifth difference is less than the fourth difference, which can prevent the user from having difficulty adapting, so the present invention can indeed be achieved. the goal of.

However, the above are only examples of the present invention and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. within the scope covered by the patent of this invention.

2: First optical zone 3: Second optical zone 4: The third optical zone 5: The fourth optical zone 6: The fifth optical zone C: Center origin

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a schematic diagram of an embodiment of a children's myopia control contact lens of the present invention; Figure 2 is a difference diagram of this embodiment, illustrating a first difference, a second difference, a third difference, a fourth difference and a fifth difference respectively when the corrected diopter is 100 degrees ~ Change at 400 degrees; and Figure 3 is another difference diagram of this embodiment, illustrating that the first difference, the second difference, the third difference, the fourth difference and the fifth difference are respectively at a corrected diopter of 500 degrees. Change at ~800 degrees.

2: First optical zone

3: Second optical zone

4: The third optical zone

5: The fourth optical zone

6: The fifth optical zone

C: Center origin

Claims (3)

A children's myopia control contact lens is used to produce a corrective diopter capable of correcting myopia. The children's myopia control contact lens includes: A first optical zone defines a central origin. The scope of the first optical zone is within a diameter of 0.5mm±0.05mm surrounding the central origin and with the central origin as the center. The first optical zone includes A first refractive power is formed together, and the difference between the first refractive power and the corrected refractive power is a first difference; A second optical zone surrounds the first optical zone, and the range of the second optical zone is within a diameter of 1 mm ± 0.05 mm outside the first optical zone and with the central origin as the center. The second optical zone includes a jointly formed second refractive power, and the difference between the second refractive power and the corrected refractive power is a second difference; a third optical zone surrounding the second optical zone, the range of the third optical zone being within a diameter of 1.5mm±0.05mm outside the second optical zone and with the central origin as the center, The third optical zone includes a jointly formed third refractive power, and the difference between the third refractive power and the corrected refractive power is a third difference value; A fourth optical zone surrounds the third optical zone. The range of the fourth optical zone is within a diameter of 2mm±0.05mm outside the third optical zone and with the central origin as the center. The fourth optical zone includes a jointly formed fourth refractive power, and the difference between the fourth refractive power and the corrected refractive power is a fourth difference; and a fifth optical zone surrounding the fourth optical zone, the scope of the fifth optical zone being within a diameter of 3.5mm±0.25mm outside the fourth optical zone and with the central origin as the center, The fifth optical zone includes a fifth refractive power formed together, and the difference between the fifth refractive power and the corrected refractive power is a fifth difference; The first refractive power, the second refractive power, the third refractive power, the fourth refractive power and the fifth refractive power together form the corrected refractive power, the second difference is greater than the first difference, and the third Three differences are greater than the second difference, the fourth difference is less than the third difference, and the fifth difference is less than the fourth difference. When the corrected diopter changes from 100 to 800, the first difference The value shows a trend from large to small and then becomes larger. The second difference value shows a trend from large to small and then becomes larger. The third difference value shows a trend from small to large and then becomes smaller. The fourth difference value shows a trend from small to large and then becomes smaller again. The fifth difference value shows a trend from small to large and then becomes smaller again, and the fifth difference value shows a trend from large to small and then becomes larger again. The children's myopia control contact lens as described in claim 1, wherein when the corrected diopter falls within the range of 400 degrees to 500 degrees, the first difference changes to a minimum value, and the second difference changes to a minimum value, The third difference value changes to the maximum value, the fourth difference value changes to the maximum value, and the fifth difference value changes to the minimum value. The children's myopia control contact lens as described in claim 1, wherein when the corrected diopter changes from 100 degrees to 800 degrees, the first difference is between -40 degrees ~ -95 degrees, and the second difference is between -40 degrees and -95 degrees. The difference is between 0 degrees and -50 degrees, the third difference is between 20 and 60 degrees, the fourth difference is between 1 and 12 degrees, and the fifth difference is between 1 and 12 degrees. The value is between -1 degrees and -12 degrees.

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