Dynamic tear lenses
Dynamic contact lenses fabricated with a dynamic portion that extends outward from the peripheral portion are disclosed. When worn on an eye the dynamic portion forms a tear lens for correcting vision. The dynamic portion can also be configured to provide a dynamic tear lens that changes optical power with forces applied by eyelids. The dynamic portion can be configured to assume a conforming configuration and at least one non-conforming configuration, or can be configured to assume at least two non-conforming configurations. The dynamic contact lenses can be used for correcting vision such as correcting presbyopia.
1. A dynamic contact lens comprising:
a peripheral portion;
one or more fenestrations disposed in the peripheral portion;
an interior dynamic portion coupled to the peripheral portion, wherein the interior dynamic portion, when worn on an eye, is configured to form with the eye a cylindrically shaped tear lens, the interior dynamic portion assuming
a conforming configuration configured to provide a first optical power to an eye; and
at least one non-conforming configuration configured to provide a second optical power to the eye, wherein the second optical power is different than the first optical power;
wherein the lens comprises a material having a Young's modulus from about 0.1 MPa to about 3 MPa; and
wherein the lens is configured to correct an astigmatism when worn on the eye.
2. The dynamic contact lens of claim 1 , further comprising:
one or more fenestrations configured to facilitate flow of a fluid from an anterior surface of the lens to a posterior surface of the lens.
3. The dynamic contact lens of claim 2 , further comprising:
one or more channels in the posterior surface of the lens, wherein the one or more channels are fluidly coupled to the one or more fenestrations and configured facilitate flow of a fluid to the interior dynamic portion.
4. The dynamic contact lens of claim 1 , further comprising:
a transition zone coupling the peripheral portion and the interior dynamic portion, the transition zone configured to facilitate transitioning the interior dynamic portion between two or more configurations.
5. The dynamic contact lens of claim 4 , wherein the transition zone comprises one or more features configured to enhance the flexibility of the interior dynamic portion.
6. The dynamic contact lens of claim 5 , wherein the one or more features is selected from a group comprising smooth edges, a thinned cross-sectional thickness, grooves, or any combination thereof.
7. The dynamic contact lens of claim 1 , wherein the interior dynamic portion and peripheral portion have the same base curvature when in the conforming configuration.
8. The dynamic contact lens of claim 1 , wherein the interior dynamic portion and peripheral portion have a different base curvature when in the at least one non-conforming configuration.
9. The dynamic contact lens of claim 1 , wherein the interior dynamic portion and peripheral portion are made of the same material.
10. The dynamic contact lens of claim 1 , wherein the interior dynamic portion and the peripheral portion are made of one or more materials having the same Young's modulus.
11. The dynamic contact lens of claim 1 , wherein the lens comprises a soft material.
12. The dynamic contact lens of claim 1 , wherein the tear lens provides an additional optical power to the eye.