Contact lenses for refractive correction
Ophthalmic lenses for correcting refractive error of an eye are disclosed. Ophthalmic lenses include a deformable inner portion and a deformable peripheral portion. When disposed over the optical region of an eye, the inner portion is configured so that engagement of the posterior surface against the eye deforms the posterior surface so that the posterior surface has a shape diverging form the refractive shape of the epithelium when viewing with the eye through the ophthalmic lens. The rigidity of the inner portion is greater than the rigidity of the peripheral portion and the ophthalmic lenses are configured to allow movement relative to the eye upon blinking of the eye and to be substantially centered on the optical region of the cornea following the blinking of the eye. Methods of correcting refractive errors of an eye such as astigmatism or spherical aberration using the ophthalmic lenses are also disclosed.
1. An ophthalmic lens, the lens comprising:
an inner portion comprising an anterior surface and a posterior surface, wherein at least a portion of the posterior surface has a shape diverging from a refractive shape of a cornea of an eye such that it vaults to form a lenticular volume between at least the portion of the posterior surface and the cornea when disposed thereon;
a peripheral portion disposed radially outward of the inner portion and comprising a posterior surface configured to contact a surface of the eye when disposed thereon; and
a plurality of fenestrations disposed in the inner portion, the peripheral portion, or both the inner portion and the peripheral portion, wherein the plurality of fenestrations is configured to pump tear fluid into and out of the lenticular volume when the eye blinks,
wherein the lenticular volume is configured to mitigate astigmatism or high-order aberration.
2. The lens of claim 1 , wherein the lenticular volume is configured to mask corneal toricity.
3. The lens of claim 1 , wherein the lenticular volume is configured to mitigate astigmatism independent of a rotational orientation of ophthalmic lens about a viewing axis of the eye.
4. The lens of claim 1 , wherein the lenticular volume is configured to mitigate astigmatism substantially independent of a shape of the lenticular volume.
5. The lens of claim 1 , wherein the anterior surface of the inner portion is characterized by a substantially spherical profile.
6. The lens of claim 1 , wherein the anterior surface of the inner portion has a spherical power.
7. The lens of claim 1 , wherein the anterior surface of the inner portion is characterized by a substantially spherical profile without a cylindrical component.
8. The lens of claim 1 , wherein the anterior surface and the posterior surface of the inner portion are radially symmetric.
9. The lens of claim 1 , wherein at least one fenestration of the plurality of fenestrations extends from an anterior surface of the peripheral portion to the posterior surface of the peripheral portion.
10. The lens of claim 4 , wherein the posterior surface of the peripheral portion comprises one or more channels thereon configured to provide a fluid flow pathway between the at least one fenestration and the lenticular volume.
11. The lens of claim 1 , wherein at least one fenestration of the plurality of fenestrations extends from the anterior surface of the inner portion to the posterior surface of the inner portion.
12. The lens of claim 1 , wherein the inner portion and the outer portion comprise a single piece of material.
13. The lens of claim 1 , wherein the inner portion and the outer portion comprise the same material.
14. The lens of claim 1 , wherein the inner portion and the outer portion comprise a material selected from silicone, silicone hydrogel, a hydrogel, or a combination thereof.
15. An ophthalmic lens, the lens comprising:
an inner portion;
an anterior surface;
a peripheral portion disposed radially outward of the inner portion and comprising a posterior surface, wherein at least a portion of the posterior surface has a shape diverging from a refractive shape of a cornea of an eye such that it vaults to form a lenticular volume between at least the portion of the posterior surface and the cornea when disposed thereon; and
a plurality of fenestrations disposed in the inner portion, the peripheral portion, or both the inner portion and the peripheral portion, wherein the plurality of fenestrations is configured to pump tear fluid into and out of the lenticular volume when the eye blinks,
wherein the lenticular volume is configured to mitigate astigmatism or high-order aberration.
16. The lens of claim 15 , wherein the lenticular volume is configured to mask corneal toricity.
17. The lens of claim 15 , wherein the lenticular volume is configured to mitigate astigmatism independent of a rotational orientation of ophthalmic lens about a viewing axis of the eye.
18. The lens of claim 15 , wherein the lenticular volume is configured to mitigate astigmatism substantially independent of a shape of the lenticular volume.
19. The lens of claim 15 , wherein at least a portion of the anterior surface is characterized by a substantially spherical profile.
20. The lens of claim 15 , wherein at least a portion of the anterior surface has a spherical power.
21. The lens of claim 15 , wherein at least a portion of the anterior surface is characterized by a substantially spherical profile without a cylindrical component.
22. The lens of claim 15 , wherein the anterior surface extends along the inner portion and the peripheral portion.
23. The lens of claim 15 , wherein at least a portion of the posterior surface of the peripheral region is configured to contact a surface of the eye when disposed thereon.