TWI745092B - Progressive continuous zoom contact lenses - Google Patents

Abstract

A progressive and continuous zoom contact lens includes: an optical axis, a first optical zone and a second optical zone. The refractive power of the contact lens continuously changes from the optical axis to the outside of the contact lens. The optical axis is located at the center of the first optical region. The average refractive power of the first optical region is a first refractive power. The plane perpendicular to the optical axis is a reference plane. The orthographic projection of the first optical region on the reference plane is a circle with a first diameter. The orthographic projection of the second optical region on the reference plane is a circular ring. The inner diameter of the ring is a second diameter. The outside diameter of the ring is a third diameter. The second diameter is greater than the first diameter. The average diopter of the second optical region is a second diopter. The difference between the second diopter and the first diopter is a close addition power.

Description

Progressive continuous zoom contact lenses

The present invention relates to a kind of glasses, and more particularly to a progressive continuous zoom contact lens.

Glasses are widely used to correct many different types of vision defects, including myopia, hyperopia, and/or presbyopia. Contact lens is a kind of spectacle lens that is directly attached to the user's eyeballs, and there is no frame or frame that will affect the appearance of the user's face, which can improve the beauty and comfort.

The existing contact lenses for myopia, hyperopia, and/or presbyopia have limited functions. When the user's eyes have various symptoms, the existing contact lenses often fail to meet the needs of lens adjustment degradation and long-term short-distance eye use. Therefore, how to effectively improve the viewing range of the contact lens when the lens adjustment is degraded and the comfort of long-term and short-distance eye use are indeed the focus of attention of relevant persons in the art.

The "prior art" paragraph is only used to help understand the content of the present invention, so the contents disclosed in the "prior art" paragraph may include some conventional technologies that do not constitute the common knowledge in the technical field. The content disclosed in the "prior art" paragraph does not represent the content or the problem to be solved by one or more embodiments of the present invention, and has been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

The invention provides a progressive and continuous zoom contact lens, which can effectively improve the viewing range of presbyopic patients and the comfort of long-term short-distance eye use.

The other objectives and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

The progressive continuous zoom contact lens of the present invention includes an optical axis, a first optical zone and a second optical zone. The refractive power of the contact lens continuously changes from the optical axis to the outside of the contact lens. The optical axis is located at the center of the first optical region. The average refractive power of the first optical zone is a first refractive power, and the first refractive power is a myopia power. The plane perpendicular to the optical axis is a reference plane. The orthographic projection of the first optical region on the reference plane is a circle with a first diameter. The orthographic projection of the second optical region on the reference plane is a circular ring. The inner diameter of the ring is a second diameter. The outside diameter of the ring is a third diameter. The second diameter is greater than the first diameter. The average diopter of the second optical region is a second diopter. The difference between the second diopter and the first diopter is a close addition power, and the close addition power is an adjustment power.

The progressive continuous zoom contact lens of the present invention includes an optical axis, a first optical zone and a second optical zone. The refractive power of the contact lens continuously changes from the optical axis to the outside of the contact lens. The optical axis is located at the center of the first optical region. The average refractive power of the first optical zone is a first refractive power, and the first refractive power is a myopia power. The plane perpendicular to the optical axis is a reference plane. The orthographic projection of the first optical region on the reference plane is a circle with a first diameter. The orthographic projection of the second optical region on the reference plane is a circular ring. The inner diameter of the ring is a second diameter. The outside diameter of the ring is a third diameter. The second diameter is greater than the first diameter. The average diopter of the second optical region is a second diopter. The difference between the second diopter and the first diopter is a close addition power, and the close addition power is a decompression power.

In an embodiment of the present invention, the aforementioned first diameter is between 0.8 mm and 1.2 mm, and the second diameter is between 4.8 mm and 5.2 mm.

In an embodiment of the present invention, the aforementioned contact lens further includes a defocus area, the orthographic projection of the defocus area on the reference plane is a circular ring, the inner diameter of the circular ring is a fourth diameter, and the distance The diopter of the focal area is out of focus.

In an embodiment of the present invention, the diopter of the above-mentioned defocus area gradually increases from the inside to the outside from the second diopter to above +0.5D.

In an embodiment of the present invention, the aforementioned fourth diameter is between 4 mm and 5 mm, and the fifth diameter is between 6.6 mm and 7.4 mm.

In an embodiment of the present invention, the aforementioned fourth diameter is greater than the second diameter.

Based on the above, the contact lens provided by the present invention can effectively improve the viewing range of the presbyopic patient and the comfort of long-term short-distance eye use by setting the first optical zone, the second optical zone and the short-range addition power.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

The foregoing and other technical content, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate but not to limit the present invention.

Please refer to FIG. 1, which is a schematic diagram of a progressive and continuous zoom contact lens 1 according to an embodiment of the present invention. The contact lens 1 includes a first optical zone 11 and a second optical zone 13. The average refractive power of the first optical region 11 is a first refractive power, and the average refractive power of the second optical region 13 is a second refractive power. Thereby, the contact lens 1 can be applied to the application of lens adjustment degradation or eyeball decompression, which can effectively improve the viewing range and comfort. The specific structure details will be described in detail below.

Please refer to FIG. 2 at the same time. FIG. 2 is a schematic diagram of a contact lens 1 according to an embodiment of the present invention, which is used to specifically illustrate the optical area of the contact lens 1. The contact lens 1 includes an optical axis OA, a first optical area 11 and a second optical area 13. The plane perpendicular to the optical axis OA is a reference plane R. The refractive power of the contact lens 1 continuously changes from the optical axis OA to the outside of the contact lens 1. The optical axis OA is located at the center of the first optical region 11. The average refractive power of the first optical region 11 is a first refractive power. As shown in FIG. 2, the orthographic projection m11 of the first optical region 11 on the reference plane R is a circle with a first diameter D1. The orthographic projection m13 of the second optical region 13 on the reference plane R is a circular ring. The inner diameter of the ring is a second diameter D2, and the outer diameter of the ring is a third diameter D3. The second diameter D2 is greater than the first diameter D1. The average refractive power of the second optical region 13 is a second refractive power.

In this embodiment, the difference between the second refractive power and the first refractive power is a close addition power. The short-range addition power can, for example, allow the contact lens 1 to be used for lens adjustment degradation or eyeball decompression. The user's brain can judge and select the farther image or the closer image, so that the lens can reduce the pressure of adjustment so that the light can be focused on the retina. Since the refractive power of the contact lens 1 continuously changes from the optical axis OA to the outside, the contact lens 1 is a progressive continuous zoom contact lens. The focal point of the contact lens 1 is continuous, and there is no ghost phenomenon caused by, for example, a discontinuous focal point. The contact lens 1 can effectively improve the viewing range of the presbyopic patient and the comfort of long-term short-distance eye use.

As shown in FIG. 1, the contact lens 1 includes an inner mirror surface 17 and an outer mirror surface 19. The present invention does not limit the structures such as the curvature of the inner mirror surface 17 and the outer mirror surface 19, nor does it limit their forming methods and materials. As long as the refractive power of the contact lens 1 continuously changes from the optical axis OA to the outside, and the difference between the second refractive power and the first refractive power is the close addition power, it falls within the scope of the present invention. The inner mirror surface 17 and/or the outer mirror surface 19 may be, for example, a spherical surface, an aspheric surface, and/or a free-form surface, but the present invention is not limited thereto.

Please refer to FIG. 3 at the same time. FIG. 3 is a schematic diagram of the refractive power of a contact lens according to an embodiment of the present invention. Figure 3 shows an illustration of some refractive powers of the contact lens 1. In FIG. 3, the horizontal axis shows the radius value of the contact lens 1 outward from the optical axis OA, and the vertical axis shows the diopter power of the contact lens 1. The close addition degree is represented by ADD. Fig. 3 shows an example of the refractive power of the contact lens 1 when the near addition power is 0.5D, 1.0D, 1.5D, 2.0D, 2.5D, 3.0D, 3.5D, 4.0D. When the short-range addition power is between 0.5D and 1.0D, the contact lens 1 is more suitable for use in decompression of the eyeball, but the present invention is not limited to this. When the short-range addition power is above 1.5D, the contact lens 1 is more suitable for application to presbyopia, but the present invention is not limited to this.

In an embodiment of the present invention, the first diameter is between 0.8 mm and 1.2 mm, the second diameter is between 4.8 mm and 5.2 mm, and the third diameter is between 5.3 mm and 5.7 mm. The refractive power of the contact lens 1 in the area between the first optical area 11 and the second optical area 13 changes continuously.

In an embodiment of the present invention, the first diameter is 1 mm, the second diameter is 5 mm, and the third diameter is 5.5 mm.

In an embodiment of the present invention, the first refractive power of the contact lens 1 is a myopia power, and the near-distance addition power is an adjustment power. The contact lens 1 is applied to presbyopia. For example, the first optical area 11 is used to correct the user's nearsightedness and is used to view distant objects; the second optical area 13 is used to correct the user's presbyopia and is used to view closer objects. The focal point of the contact lens 1 is continuous, and there is no ghost phenomenon caused by, for example, a discontinuous focal point.

In an embodiment of the present invention, the first diopter of the contact lens 1 is a myopia power, and the near addition power is a decompression power. The contact lens 1 is used for decompression of the eyeball. For example, the second optical zone 13 is used for viewing closer objects, which can reduce the user's intraocular pressure.

Please refer to FIG. 4, which is a schematic diagram of the refractive power of a contact lens according to an embodiment of the present invention. FIG. 4 shows an example of a refractive power of the contact lens 1. FIG. 4 shows an example of the refractive power of the contact lens 1 when the first refractive power (myopia power) is about -3.0D, and the near addition power (presbyopia or decompression power) is 2.25D.

Please refer to FIG. 5, which is a schematic diagram of a contact lens 2 according to another embodiment of the present invention. The structure and function of the contact lens 2 of this embodiment are similar to those of the contact lens 1 shown in FIGS. 1 to 3. The difference between this embodiment and the embodiment shown in FIGS. 1 to 3 is that the contact lens 2 further includes a defocusing area 15.

Please refer to FIG. 6 at the same time. FIG. 6 is a schematic diagram of a contact lens 2 according to another embodiment of the present invention, which is used to specifically illustrate the optical area of the contact lens 2. The orthographic projection m15 of the defocus area 15 on the reference plane R is a circular ring. The inner diameter of the ring is a fourth diameter D4. The outer diameter of the ring is a fifth diameter D5, and the present invention does not limit the size of the fifth diameter D5.

The diopter of the defocus area 15 is out of focus, that is, the diopter of the defocus area 15 is higher than the second diopter by more than 0.5D. Do not let the diopter focus of the defocused area fall within the optical zone and cause interference and multiple images. The contact lens 2 can effectively improve the viewing range of the presbyopic patient and the comfort of long-term short-distance eye use.

In summary, the contact lens of the embodiment of the present invention can effectively improve the viewing range and comfort by setting the first optical zone, the second optical zone, and the close-up power.

1, 2: Contact lenses

11: The first optical zone

13: The second optical zone

15: Defocus area

17: Inside mirror

19: Outside mirror

D1: first diameter

D2: second diameter

D3: third diameter

D4: Fourth diameter

D5: fifth diameter

m11, m13, m15, mOA: orthographic projection

OA: Optical axis

R: Reference surface

Fig. 1 is a schematic diagram of a contact lens according to an embodiment of the present invention. Fig. 2 is a schematic diagram of a contact lens according to an embodiment of the present invention. Fig. 3 is a schematic diagram of the refractive power of a contact lens according to an embodiment of the present invention. Fig. 4 is a schematic diagram of the refractive power of a contact lens according to an embodiment of the present invention. Fig. 5 is a schematic diagram of a contact lens according to another embodiment of the present invention. Fig. 6 is a schematic diagram of a contact lens according to another embodiment of the present invention.

1: contact lens

11: The first optical zone

13: The second optical zone

17: Inside mirror

19: Outside mirror

OA: Optical axis

R: Reference surface

Claims (5)

A progressive continuous zoom contact lens, comprising: an optical axis, the diopter of the contact lens continuously changes from the optical axis to the outside of the contact lens; a first optical zone, the optical axis is located at the center of the first optical zone, the The average refractive power of the first optical region is a first refractive power, the first refractive power is a myopia power, the plane perpendicular to the optical axis is a reference surface, and the orthographic projection of the first optical region on the reference surface is a first refractive power. A circle with a diameter, a second optical zone, the orthographic projection of the second optical zone on the reference plane is a circular ring, the inner diameter of the circular ring is a second diameter, and the outer diameter of the circular ring is a third diameter , The second diameter is greater than the first diameter, the average diopter of the second optical region is a second diopter, the difference between the second diopter and the first diopter is a close addition power, and the close addition power is An adjustment degree; and a defocus area located outside the second optical area, the orthographic projection of the defocus area on the reference surface is a circular ring, the inner diameter of the circular ring is a fourth diameter, the circular ring The outer diameter is a fifth diameter, and the diopter of the defocus area is defocused and gradually increases from the second diopter to above +0.5D from the inner side to the outer side. A progressive and continuous zoom contact lens, comprising: an optical axis, the refractive power of the contact lens continuously changes from the optical axis to the outside of the contact lens; a first optical zone, the optical axis is located at the center of the first optical zone, the The average refractive power of the first optical region is a first refractive power, the first refractive power is a myopia power, a plane perpendicular to the optical axis is a reference surface, and the orthographic projection of the first optical region on the reference surface is a first refractive power. A circle with a diameter, a second optical zone, the orthographic projection of the second optical zone on the reference plane is a circular ring, the inner diameter of the circular ring is a second diameter, and the outer diameter of the circular ring is a third diameter ,Should The second diameter is greater than the first diameter, the average refractive power of the second optical zone is a second refractive power, the difference between the second refractive power and the first refractive power is a close-up added power, and the close-up added power is a minus Pressure; and a defocus area located outside the second optical area, the orthographic projection of the defocus area on the reference surface is a circular ring, the inner diameter of the circular ring is a fourth diameter, and the outer side of the circular ring The diameter of is a fifth diameter, and the diopter of the defocus area is defocused and gradually increases from the second diopter to above +0.5D from the inner side to the outer side. The progressive continuous zoom contact lens according to claim 1 or 2, wherein the first diameter is between 0.8 mm and 1.2 mm, and the second diameter is between 4.8 mm and 5.2 mm. The progressive continuous zoom contact lens according to claim 1 or 2, wherein the fourth diameter is between 4 mm and 5 mm, and the fifth diameter is between 6.6 mm and 7.4 mm. The progressive continuous zoom contact lens according to claim 1 or 2, wherein the fourth diameter is greater than the second diameter.

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