Optical lens

Abstract

The present disclosure provides an optical lens. [Solution] An optical lens having an optical zone, the optical zone including a relax zone, a distance zone surrounding the relax zone, and a defocus zone surrounding the distance zone and the relax zone, and the refractive index of the relax zone gradually decreases along the direction from the center of the optical zone to the edge of the optical zone.

Description

Technical Field

[0001] The present disclosure relates to an optical lens, and more particularly to a myopia correction lens having a relaxation function.

Background Art

[0002] Myopia correction lenses provide a single-focus design and can effectively focus on the center of the retina to correct myopia. However, the peripheral retina forms an image behind the eye axis, and the eye axis continues to elongate. Therefore, single-focus lenses can correct myopia but cause the progression of myopia.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In some myopia correction lens designs, for example, in ring defocus, diplopia is likely to occur. When applying myopia correction lenses to children's myopia correction, it will affect the children's willingness to wear them, and the correction effect is not good. Also, during the process of using the eyes for adjustment at close range for a long time, pressure is likely to accumulate and discomfort occurs.

[0004] In view of this, how to provide an optical lens that can solve the above problems is one of the goals that the current industry is striving to research.

Means for Solving the Problems

[0005] The technical aspect of the present disclosure is an optical lens applied to myopia correction.

[0006] In one embodiment of the present disclosure, the optical lens includes an optical zone, and the optical zone includes a relaxation zone, a distance zone surrounding the relaxation zone, and a defocus zone surrounding the distance zone and the relaxation zone. The refractive power of the relaxation zone gradually decreases along the direction from the center of the optical zone to the edge of the optical zone.

[0007] In one embodiment of the present disclosure, the addition of the relaxation zone is in the range of +0.25D to +1.00D.

[0008] In one embodiment of the present disclosure, the refractive power of the distance zone is a fixed value.

[0009] In one embodiment of the present disclosure, the refractive power of the distance zone gradually increases along the direction from the relaxation zone to the edge of the optical zone.

[0010] In one embodiment of the present disclosure, the refractive power of the defocus zone gradually increases along the direction from the distance zone to the edge of the optical zone.

[0011] In one embodiment of the present disclosure, the optical zone further includes an enhancement zone surrounding the defocus zone.

[0012] In one embodiment of the present disclosure, the refractive power of the enhancement zone gradually increases along the edge from the edge between the defocus zone and the enhancement zone to the edge of the optical zone.

[0013] In one embodiment of the present disclosure, the refractive power of the enhancement zone gradually decreases along the edge from the edge between the defocus zone and the enhancement zone to the edge of the optical zone.

[0014] In one embodiment of the present disclosure, the absolute value of the change in refractive power of the enhancement zone is greater than the absolute value of the change in refractive power of the defocus zone, and the change in refractive power is the ratio of the refractive power divided by the radius of the lens.

[0015] In one embodiment of the present disclosure, the refractive power of the enhancement zone circulates and reciprocates within a certain interval.

[0016] In one embodiment of the present disclosure, the optical lens is a hard contact lens or a soft contact lens.

[0017] In one embodiment of the present disclosure, the material of the optical lens includes a hydrogel or a silicone hydrogel.

[0018] In one embodiment of the present disclosure, the optical lens is arranged to be stored in a lens storage solution, and the lens storage solution has a low content of mydriatic drug arranged to relax the ciliary muscle of the eyeball and enhance the effect of delaying the progression of myopia.

[0019] In one embodiment of the present disclosure, the optical lens is an anti-blue light lens.

[0020] In one embodiment of the present disclosure, the optical lens has an astigmatic refractive power and an astigmatic axis and is configured to correct astigmatism.

[0021] In the above embodiment, the optical lens of the present disclosure can reduce the discomfort caused by excessive accommodation of the eyeball for a long time by installing a relaxation zone. The refractive power of the defocus zone gradually increases along the direction from the distance zone to the edge of the optical zone. Different from the refractive power of the distance zone, it can improve the problem that the eye axis continuously elongates due to the defocus zone of the conventional single-focus lens that forms an image behind the retina, and can delay the progression of myopia.

Brief Description of the Drawings

[0022]

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Embodiments for Carrying out the Invention

[0023] Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. For the sake of clear explanation, many practical details are described together below. However, the reader should understand that these practical details are not for limiting the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. Also, in order to simplify the drawings, some conventionally used structures and elements are shown simply and schematically in the drawings. And, for clarity, the thicknesses of layers and regions in the drawings may be exaggerated, and like reference numerals in the description of the drawings refer to like elements.

[0024] Figure 1A is a top view showing an optical lens 100 according to an embodiment of the present disclosure. The optical lens 100 includes an optical zone OZ, a peripheral zone PZ, and a center 102. The optical zone OZ includes a Relax Zone 110, a Distance Zone 120, a Defocus Zone 130, and an Enhance Zone 140. The Distance Zone 120 surrounds the Relax Zone 110, and the Defocus Zone 130 surrounds the Distance Zone 120 and the Relax Zone 110. The optical lens 100 of the present disclosure is applied to correct myopia and slow down the progression of myopia. A low content of mydriatic agent may be added to the preservation solution of the optical lens 100 to relax the ciliary muscle of the eyeball, avoid excessive accommodation of the eyeball, and enhance the effect of slowing down the progression of myopia. The optical lens 100 may be a hard contact lens, a soft contact lens, or a high oxygen permeability hard contact lens. The conventional manufacturing method of a hard contact lens refers to combining the front curve and the base curve of the curvature radius of a single or multi-segment by an ultra-precision machining machine (for example, Ametek Optoform80) to process a hard polymer material (for example, PMMA) so as to satisfy the compatibility with the optical characteristics and corneal curvature. The conventional manufacturing method of a soft contact lens is, for example, manufactured by a casting method in which the upper half of the back arc having lens optics and shape is combined with the lower half of the front arc, filling the liquid soft contact lens polymer material into the upper and lower half die chambers, polymerizing it into a solid state at a high temperature, and performing hydration, preservation solution packing (for example, PP blister packing), and sterilization to obtain a finished product, packaging it, and labeling it as a commodity. The material of the optical lens 100 may include hydrogel or silicone hydrogel. Generally, the hydrogel component of a common soft contact lens is polyhydroxyethyl methacrylate (p-HEMA), and its oxygen permeability (Dk / t x10 -9) is about 15 to 40, for example, Etafilcon A. The silicone hydrogel material is a hydrogel added with a silicone material having high oxygen permeability, and its ventilation rate (Dk / t x10 -9 ) is about 50 to 150, for example, senofilcon A. In some embodiments, the optical lens 100 may be an anti-blue light lens. The anti-blue light lens refers to one that uses a material capable of absorbing or blocking part or all of the wavelength of blue light from 380 nanometers to 500 nanometers. The conventional general technology is dyeing or coating, and the above functions with different blue light absorption rates can be achieved.

[0025] FIG. 1B is a cross-sectional view taken along line 1B-1B of FIG. 1A. The optical lens 100 has a base curve (BC), a front curve (FC), a central thickness (CT), and a diameter (D). In this embodiment, it is exemplified that the diameter D is 8 millimeters, but the present disclosure is not limited thereto. The base curve BC can be adjusted to adapt to different symptoms or the wearing requirements of different age groups based on the eye characteristics of the wearer, and the front curve FC can control the required diopter.

[0026] FIG. 2 is a relationship diagram between the refractive power and the radius of the optical lens according to an embodiment of the present disclosure. In this embodiment, the range of the relaxation zone 110 is from about a radius of 0 millimeter (i.e., the center 102) to a radius of 1 millimeter. The range of the distance zone 120 is from about a radius of 1 millimeter to a radius of 2 millimeters. The range of the defocus zone 130 is from about a radius of 2 millimeters to a radius of 3.5 millimeters. The range of the enhancement zone 140 is from about a radius of 3.5 millimeters to a radius of 4 millimeters. The ranges of the above zones are only illustrative and not intended to limit the present invention.

[0027] As shown in FIG. 2, the refractive power of the distance zone 120 is determined by the refractive power required for myopia correction. In this embodiment, the refractive power of the distance zone 120 is -3.0D and is a fixed value. The refractive power of the relaxation zone 110 gradually decreases along the direction from the center 102 of the optical zone OZ to the edge 142 of the optical zone OZ. That is, the refractive power of the relaxation zone 110 is greater than the refractive power of the distance zone 120. The addition (ADD) of the relaxation zone 110 is between +0.25D and +1.00D. In a preferred embodiment, the addition (ADD) of the relaxation zone 110 is between +0.50D and +0.75D. As an example, the refractive power of the relaxation zone 110 in this embodiment gradually decreases from -2.5D to -3.0D. That is, the addition of the relaxation zone 110 is +0.5D. By providing the relaxation zone 110, the discomfort caused by excessive accommodation of the eyeball for a long time can be reduced.

[0028] The refractive power of the defocus zone 130 gradually increases along the direction from the distance zone 120 to the enhancement zone 140 (i.e., the direction to the edge 142 of the optical zone OZ). In this embodiment, the refractive power of the defocus zone 130 gradually increases from -3.0D to about -0.5D, which is different from the refractive power of the distance zone 120. This improves the problem that the defocus zone of the conventional single-focus lens forms an image behind the retina, resulting in continuous elongation of the eye axis.

[0029] In this embodiment, the refractive power of the enhancement zone 140 gradually decreases from the edge 132 between the defocus zone 130 and the enhancement zone 140 to the edge 142 of the optical zone OZ. For example, the refractive power of the enhancement zone 140 gradually decreases from -0.5D to -3.5D. As shown by the line segment of the refractive power in the figure, the slope of the refractive power line segment of the enhancement zone 140 is greater than that of the defocus zone 130, and the slopes of both are in opposite directions. Here, the amount of change in refractive power is defined as the ratio of the refractive power divided by the radius of the lens. The absolute value of the amount of change in refractive power of the enhancement zone 140 is 3.0D divided by 0.5, which is 6. The absolute value of the amount of change in refractive power of the defocus zone 130 is 2.5D divided by 1.5, which is 1.7. As can be seen from this, the absolute value of the amount of change in refractive power of the enhancement zone 140 is greater than that of the defocus zone 130. By designing the obvious difference in the amount of change in refractive power between the defocus zone 130 and the enhancement zone 140, imaging interference can be eliminated, and the attention of the generated images to the distance zone 120 and the defocus zone 130, the corresponding myopia correction, and the defocus effect can be improved.

[0030] Figure 3 is a simulation diagram of image formation of the optical lens in Figure 2. The light ray 200 passes through the optical lens 100 and then converges at the focal point F of the retina 300 to form an image. In the drawing, the virtual image 230 generated in the defocus zone 130 and the virtual image 240 generated in the enhancement zone 140 are shown by dashed lines. As described above, since the virtual image 230 generated in the defocus zone 130 is located in front of the retina 300, the progression of myopia due to the continuous elongation of the eye axis can be avoided. Since the virtual image 240 of the enhancement zone 140 is hardly recognized by the brain, the same effect as shielding the enhancement zone 140 occurs. Also, in this embodiment, since the inclination of the refractive index line segment of the enhancement zone 140 and the inclination of the refractive index line segment of the defocus zone 130 are in opposite directions, the virtual image 240 here not only is not continuous with the image formation of the defocus zone 230, but there is also a possibility that it cannot be imaged. In this way, the brain can hardly identify or process the virtual image 240 of the enhancement zone 140, thereby enhancing the attention to the defocus zone 130 and the distance zone 120. Therefore, with the optical lens 100 of the present disclosure, the wearer can have a clear visual effect both when viewing a near object and a far object.

[0031] Figure 4 is a relationship diagram between the refractive index and the radius of the optical lens according to another embodiment of the present disclosure. This embodiment is substantially the same as the embodiment in Figure 2, and the difference is that the refractive index of the defocus zone 130a gradually increases from the distance zone 120a to the edge 132 of the defocus zone 130a. In other words, the amount of change in the refractive index between the distance zone 120a and the defocus zone 130a changes gradually, that is, the change in the refractive index is gentle. This reduces situations such as blurring and double vision due to a significant change in the refractive index, and gives the wearer a clear visual effect.

[0032] FIG. 5 is a diagram showing the relationship between the refractive power and the radius of an optical lens according to another embodiment of the present disclosure. This embodiment is substantially the same as the embodiment of FIG. 2, and the difference is that the refractive power of the enhancement zone 140a gradually increases along the direction from the defocus zone 130 to the edge 142 of the optical zone OZ. The slope of the refractive power line segment of the enhancement zone 140 and the slope of the refractive power line segment of the defocus zone 130 are in the same direction, but the slope of the refractive power line segment of the enhancement zone 140 is still significantly larger than the slope of the refractive power line segment of the defocus zone 130.

[0033] FIG. 6 is a simulation diagram of the imaging of the optical lens of FIG. 5. In the figure, the virtual image 230 generated in the defocus zone 130 and the virtual image 240a generated in the enhancement zone 140a are shown by dashed lines. As described above, the brain can hardly identify or process the virtual image 240a of the enhancement zone 140, thereby enhancing the attention to the defocus zone 130 and the distance zone 120. In this way, by designing the obvious difference in the amount of change in refractive power between the defocus zone 130 and the enhancement zone 140a, the imaging interference can be eliminated, and the attention to the generated images in the distance zone 120 and the defocus zone 130, the corresponding myopia correction, and the defocus effect can be improved.

[0034] FIG. 7 is a relationship diagram between the refractive power and the radius of an optical lens according to another embodiment of the present disclosure. This embodiment is substantially the same as the embodiment of FIG. 2, and the difference is that the refractive power of the enhancement zone 140b circulates and reciprocates within a certain range. For example, in this embodiment, the refractive power of the enhancement zone 140 reciprocates and increases or decreases within the range of 1.0D to 0.4D. Therefore, due to the rapidly changing refractive power within the enhancement zone 140, it is difficult for light rays to form an image, so the brain can hardly identify or process the virtual image of the enhancement zone 140b. As a result, the attention to the defocus zone 130 and the distance zone 120 can be enhanced. In this way, by designing the obvious difference in the amount of change in refractive power between the defocus zone 130 and the enhancement zone 140b, the imaging interference can be eliminated, and the attention to the generated images in the distance zone 120 and the defocus zone 130, as well as the corresponding myopia correction and defocus effect, can be improved.

[0035] FIG. 8A is a top view showing an astigmatic lens 400 according to an embodiment of the present disclosure. The astigmatic lens 400 includes an astigmatic optical zone 410 and an astigmatic thickening stabilization zone 420. The astigmatic thickening stabilization zone 420 of this embodiment is located below the lens and is an astigmatic lens 400 of the Prism-Ballast Type.

[0036] FIG. 8B is a top view showing an astigmatic lens 400a according to another embodiment of the present disclosure. The astigmatic lens 400a also includes an astigmatic optical zone 410a and an astigmatic thickening stabilization zone 420a. This embodiment has two astigmatic thickening stabilization zones 420a, which are respectively located on the left and right sides of the lens, and is an astigmatic lens 400a of the Double Slab-off Type.

[0037] Each of the above-mentioned astigmatic optical zones 410 and 410a includes the above-mentioned relaxation zone 110, distance zone 120, defocus zone 130, and enhancement zone 140. That is, the astigmatic optical zones 410 and 410a are used for functions such as myopia correction, relaxation, and improvement of attention described in the above embodiments. The astigmatic thickening stabilization zones 420 and 420a are configured so that the lens does not rotate after wearing in order to maintain the correct correction function, and the design of the stabilization zone is not limited to the above types.

[0038] FIG. 9 is a refractive power distribution diagram of an astigmatic lens according to an embodiment of the present disclosure. Specifically, the astigmatic optics is of the dual refractive power change type and includes a spherical refractive power, a cylindrical refractive power, and a cylindrical axis. The embodiment in FIG. 9 takes a spherical refractive power of -3.00D, a cylindrical refractive power of -1.25D (cylindrical degree of 125 degrees), and a cylindrical axis of 180 degrees as an example. Therefore, the refractive powers at lens angle 0 degrees and lens angle 180 degrees are approximately -3.00D, and the refractive powers at lens angle 90 degrees and lens angle 270 degrees are approximately -4.25. The present disclosure includes the changing refractive powers of the above-mentioned relaxation zone 110, distance zone 120, defocus zone 130, and enhancement zone 140, and the above astigmatic optical characteristics take only the axial change of the distance zone as an example.

[0039] FIG. 10 is a diagram showing the relationship between the refractive power and the radius along different angles within the optical zone of an astigmatic lens according to an embodiment of the present disclosure. Refer to FIG. 8A and FIG. 10 simultaneously. In FIG. 8A, the axial directions AX1 at 0 degrees, AX2 at 45 degrees, and AX3 at 90 degrees are shown respectively. Curves S1, S2, and S3 in FIG. 10 show the relationship curves between the refractive power and the radius along the axial directions AX1, AX2, and AX3 respectively.

[0040] This embodiment takes the refractive index distribution of the optical zone OZ as shown in FIG. 3 above as an example. In this embodiment, the spherical refractive index is -3.00D, the astigmatic refractive index is -1.25D, the axis degree is 180 degrees, and the addition degree is +0.5D (i.e., the addition degree of the relaxation zone) as an example. In the embodiment, the segment with a radius of 1 millimeter to 2 millimeters corresponds to the distance zone, and the spherical refractive index of -3.00D is used as the refractive index required for myopia correction.

[0041] Refer to FIG. 8A and FIG. 10 simultaneously. As shown by curve S1, the relationship between the refractive index and the radius along the axial direction AX1 is substantially the same as that of the embodiment in FIG. 2. As shown by curve S2, the relationship between the refractive index and the radius along the axial direction AX2 increases the astigmatic refractive index by approximately -0.63D compared to curve S1, but curve S2 tends to change with a radius similar to that of curve S1. As shown by curve S3, the relationship between the refractive index and the radius along the axial direction AX3 increases the astigmatic refractive index by approximately -1.25D compared to curve S1, but curve S2 tends to change with a radius similar to that of curve S1. The above optical design may be provided on the same side (front arc FC or base arc BC) of the lens at the same time, or may be provided on one side of each lens, and both can have the effects of relaxation, myopia correction, and astigmatism correction. In some embodiments, the spherical refractive index range of the astigmatic lens may be in the range of +10.0D to -10.0D, the astigmatic refractive index may be in the range of -0.50D to -3.50D, and the astigmatic axis degree may be in the range of 5° to 180°.

[0042] According to the above, the astigmatic lens of the present disclosure can simultaneously satisfy the relationship between the refractive index and the radius as shown in FIG. 2 and the requirements of the astigmatic refractive index and the astigmatic axis degree. In this way, such a design can provide a clear visual effect for astigmatic patients at both near and far distances. It has the effects of the relaxation zone 110, the distance zone 120, the defocus zone 130, and the enhancement zone 140 at the same time.

[0043] In short, by providing a relaxation zone, the optical lens of the present disclosure can avoid discomfort caused by excessive accommodation of the eyeball for a long time. The refractive power of the defocus zone gradually increases along the direction from the distance zone to the edge of the optical zone. Different from the refractive power of the distance zone, it can improve the problem that the defocus zone of a conventional single-focus lens forms an image behind the retina, resulting in continuous elongation of the eye axis. By designing an obvious difference in the amount of change in refractive power between the defocus zone and the enhancement zone, imaging interference can be eliminated, and the attention of the generated images for the distance zone and the defocus zone, as well as the corresponding myopia correction and defocus effect, can be improved.

[0044] Although the embodiments of the present invention have been disclosed as described above, this is not intended to limit the present invention. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on the content specified in the following claims.

Explanation of Reference Numerals

[0045] 100: Optical lens 102: Center 110: Relaxation zone 120, 120a: Distance zone 130, 130a: Defocus zone 132: Edge 140, 140a, 140b: Enhancement zone 142: Edge 200: Light ray 230: 240, 240a: Virtual image 300: Retina 400, 400a: Astigmatic lens 410, 410a: Astigmatic optical zone 420, 420a: Astigmatic thickening stabilization zone OZ: Optical zone PZ: Peripheral zone BC: Base arc FC: Front arc CT: Central thickness D: Diameter F: Focus AX1, AX2, AX3: Axial direction S1, S2, S3: Curve 1B-1B: Line segment

Claims

1. A contact lens applicable to correcting myopia and slowing down the progression of myopia, the contact lens including an optical zone, the optical zone being a relaxation zone having an addition power, the refractive power of the relaxation zone decreasing along the direction from the center of the optical zone to the edge of the optical zone, the addition power of the relaxation zone being in the range of +0.25D to +1.00D, the relaxation zone; a distance zone surrounding the relaxation zone, the refractive power of the relaxation zone being greater than the refractive power of the distance zone, the distance zone; a defocus zone surrounding the distance zone and the relaxation zone; and, an enhancement zone surrounding the defocus zone, the distance zone, and the relaxation zone, the enhancement zone being configured to generate a virtual image or make an image difficult to recognize, the refractive power of the enhancement zone decreasing along the direction from the edge between the defocus zone and the enhancement zone to the edge of the optical zone, the enhancement zone; including, the contact lens.

2. The contact lens according to claim 1, wherein the refractive power of the distance zone is a fixed value.

3. The contact lens according to claim 1, wherein the refractive power of the distance zone gradually increases along the direction from the relaxation zone to the edge of the optical zone.

4. The refractive power of the defocus zone gradually increases along the direction from the distance zone to the edge of the optical zone, the refractive power of the distance zone increases along the direction from the relaxation zone to the edge of the optical zone, the range of the distance zone is from a radius of 1 millimeter to a radius of 2 millimeters, and the range of the defocus zone is from a radius of 2 millimeters to a radius of 3.5 millimeters. The contact lens according to claim 1.

5. The absolute value of the refractive power change amount of the enhancement zone is larger than the absolute value of the refractive power change amount of the defocus zone. The refractive power change amount of the enhancement zone is the ratio of the refractive power of the enhancement zone divided by the radius of the lens in the enhancement zone, and the refractive power change amount of the defocus zone is the ratio of the refractive power of the defocus zone divided by the radius of the lens in the defocus zone. The contact lens according to any one of claims 1 to 4.

6. The contact lens is a hard contact lens or a soft contact lens. The contact lens according to any one of claims 1 to 5.

7. The material of the contact lens includes hydrogel or silicone hydrogel. The contact lens according to any one of claims 1 to 6.

8. The contact lens is an anti-blue light lens. The contact lens according to any one of claims 1 to 7.

9. The contact lens has an astigmatic refractive power and an astigmatic axis, and is configured to correct astigmatism. The contact lens according to any one of claims 1 to 8.

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