Contact lens for myopia control and method for manufacturing the same

Abstract

A contact lens for controlling myopia and a method for manufacturing the same are provided. The contact lens includes a contact layer, an intermediate layer, and a protective layer. The contact layer is for contacting the cornea of ​​an eye. The intermediate layer is formed on one side of the contact layer and includes an optical zone and an outer ring zone, wherein the outer ring zone has a plurality of scattering materials, and the density of the plurality of scattering materials increases from the inside out, thereby reducing the contrast of the eye corresponding to the outer ring zone. The protective layer is attached to one side of the intermediate layer to sandwich the intermediate layer between the contact layer and the protective layer.

Claims

1. A contact lens for controlling myopia, comprising: a contact layer for contacting the cornea of ​​an eye; an intermediate layer formed on one side of the contact layer, including an optical region and an outer ring region, wherein the outer ring region has a plurality of scattering materials, and the arrangement density of the plurality of scattering materials increases from the inside out in a disordered, aperiodic, off-axis gradient scattering design, thereby reducing the contrast of the eye corresponding to the outer ring region; and a protective layer attached to one side of the intermediate layer for sandwiching the intermediate layer between the protective layer and the contact layer.

2. The contact lens as described in claim 1, wherein, The outer ring region also includes a transition region and an outer edge region, wherein the arrangement density of the complex scattering material in the outer edge region is higher than that in the transition region.

3. The contact lens as described in claim 1, wherein, The magnitude of the complex scattering material in the outer ring region increases from the inside out.

4. The contact lens as claimed in claim 1, wherein, The complex scattering material is composed of one or any combination of iron oxide, titanium dioxide, silicon dioxide, and irregular amorphous polymer-based scattering cores.

5. The contact lens as claimed in claim 1, wherein, The outer ring area is near red to allow near red light to pass through.

6. The contact lens as claimed in claim 1, wherein, The outer ring area is amber in color to allow amber light to pass through.

7. The contact lens as claimed in claim 1, wherein, It also includes a coating layer formed on both sides of the intermediate layer to coat the intermediate layer; wherein the coating layer is composed of one or a combination of titanium dioxide and aluminum oxide.

8. The contact lens as claimed in claim 1, wherein, The contact layer also includes an outer ring area, which has a defocus design to adjust the spherical aberration of the eye corresponding to the outer ring area.

9. The contact lens as claimed in claim 8, wherein, The defocus design is achieved by setting multiple freeform surfaces in the outer ring area of ​​the contact layer.

10. The contact lens as claimed in claim 1, wherein, The diameter of the optical region of the contact layer is smaller than the diameter of the pupil of the eye, and the diameter of the optical region of the protective layer is larger than the diameter of the pupil of the eye.

11. The contact lens as claimed in claim 1, wherein, The outer ring area of ​​the intermediate layer is near red to allow near red light to pass through, and the outer ring area of ​​the contact layer also has a defocus design to adjust the positive spherical aberration of the eye corresponding to the outer ring area.

12. A method of manufacturing an optical lens for controlling myopia, comprising: forming a contact layer for contacting the cornea of ​​an eye; forming a protective layer; forming an intermediate layer on an outer side of the contact layer or an inner side of the protective layer, the intermediate layer comprising an optical region and an outer ring region, wherein the outer ring region has a plurality of scattering materials, and the arrangement density of the plurality of scattering materials increases progressively from the inside out in a disordered, aperiodic, off-axis scattering design, thereby reducing the contrast of the retina of the eye corresponding to the outer ring region; and bonding the contact layer and the protective layer to sandwich the intermediate layer between the protective layer and the contact layer.

13. The method as described in claim 12, wherein, The outer ring region also includes a transition region and an outer edge region, wherein the arrangement density of the complex scattering material in the outer edge region is higher than that in the transition region.

14. The method as described in claim 12, wherein, The magnitude of the complex scattering material in the outer ring region increases from the inside out.

15. The method as described in claim 12, wherein, The complex scattering material is composed of one or any combination of iron oxide, titanium dioxide, silicon dioxide, and irregular amorphous polymer-based scattering cores.

16. The method as described in claim 12, wherein, The outer ring of this intermediate layer is near red to allow near red light to pass through.

17. The method as described in claim 12, wherein, The outer ring of the intermediate layer is amber in color to allow amber light to pass through.

18. The method as described in claim 12, wherein, It also includes a coating layer formed on both sides of the intermediate layer to coat the intermediate layer; wherein the coating layer is composed of one or a combination of titanium dioxide and aluminum oxide.

19. The method as described in claim 12, wherein, The contact layer also includes an outer ring area, which has a defocus design to adjust the spherical aberration of the eye corresponding to the outer ring area.

20. The method as described in claim 19, wherein, The defocus design is achieved by setting multiple freeform surfaces in the outer ring area of ​​the contact layer.

21. The method as described in claim 12, wherein, The diameter of the optical region of the contact layer is smaller than the diameter of the pupil of the eye, and the diameter of the optical region of the protective layer is larger than the diameter of the pupil of the eye.

22. The method as described in claim 12, wherein, The outer ring area of ​​the intermediate layer is near red to allow near red light to pass through, and the outer ring area of ​​the contact layer also has a defocus design to adjust the positive spherical aberration of the eye corresponding to the outer ring area.

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