Ophthalmic devices and methods
View Patent ↗Ophthalmic devices are used to treat a variety of eye conditions. Such devices include intraocular lens (IOL) implants, contact lenses, intraocular telescopes, and the like. Such ophthalmic devices typically include one or more lenses to interact with visible light. According to an aspect of the disclosure, there is provided an ophthalmic device comprising a biocompatible polymer body and a metalens. The metalens is encapsulated by the polymer body. The metalens comprises a substantially transparent substrate and a plurality of subwavelength structures arranged on the substrate in a pattern to interact with visible light. subwavelength structures comprise a dielectric material such as titanium dioxide.
1. An ophthalmic device comprising:
a biocompatible polymer body; and
a planar metalens encapsulated within the polymer body, the metalens comprising:
a substantially transparent planar substrate having a first planar surface and a second planar surface opposite the first planar surface; and
a plurality of subwavelength structures dimensioned and arranged on the substrate in a pattern to focus visible light, the subwavelength structures comprising a dielectric material, wherein the device comprises an implant or inlay configured for implantation in an eye.
2. The ophthalmic device of claim 1 , wherein the implant or inlay comprises one of: an intraocular lens implant; and an intracorneal lens inlay.
3. The ophthalmic device of claim 2 , wherein the device comprises the intraocular lens implant, and the intraocular lens implant comprises one of: a phakic intraocular lens implant; and a posterior chamber intraocular lens implant.
4. The ophthalmic device of claim 1 , wherein the dielectric material is titanium dioxide.
5. The ophthalmic device of claim 1 , wherein the polymer body is hydrophobic.
6. The ophthalmic device of claim 5 , wherein the polymer body comprises one of: acrylic polymer and silicone hydrogel.
7. The ophthalmic device of claim 1 , wherein the plurality of subwavelength structures comprises nanopillars.
8. The ophthalmic device of claim 1 , wherein the substrate comprises a polymer substrate.
9. The ophthalmic device of claim 8 , wherein the polymer substrate is flexible.
10. The ophthalmic device of claim 9 , wherein the polymer substrate comprises at least one of: silicone, acrylic and a hydrogel.
11. The ophthalmic device of claim 1 , wherein the metalens is configured to correct an eyesight condition.
12. The ophthalmic device of claim 1 , wherein the subwavelength structures each have at least one respective dimension that is less than a wavelength of the visible light.
13. The ophthalmic device of claim 12 , wherein the at least one dimension comprises at least one of height, width and thickness of the subwavelength structure.
14. The ophthalmic device of claim 12 , wherein the metalens interacts with the visible light over a range of visible light wavelengths.
15. A method for making an ophthalmic implant or inlay configured for implantation in an eye comprising:
providing a planar metalens comprising a substantially transparent and planar substrate and a plurality of subwavelength structures dimensioned and arranged on the substrate in a pattern to focus visible light, the substrate having a first planar surface and a second planar surface opposite the first planar surface, the subwavelength structures comprising a dielectric material; and
encapsulating the metalens in a biocompatible polymer body.
16. The method of claim 15 , wherein providing the metalens comprises fabricating the metalens using an electron beam lithography (EBL) process.
17. The method of claim 15 , wherein the dielectric material is titanium dioxide.
18. The ophthalmic device of claim 1 , wherein the subwavelength structures are arranged on the first or second planar surface.
19. The method of claim 15 , wherein the subwavelength structures are arranged on the first or second planar surface.