Intraocular, accommodating lens and methods of use
An intraocular lens comprises an optical element adapted to be implanted within the capsular bag of a human eye. The optical element includes one or more internal layers formed by one or more planes that are moveable relative to one another in order to effect the power of the optical element.
1. A method of forming an intraocular lens, comprising:
providing an optical body adapted to be implanted in a human eye, the optical body comprising a unitary structure formed of only a single material;
releasing energy from an energy source, wherein the energy is released at a location internal to the optical body; and
creating with the released energy a plurality of surfaces extending through a portion of the unitary structure forming one or more concentric internal layers and an outer layer,
wherein the one or more concentric internal layers are surrounded by the outer layer at a first region and the one or more concentric internal layers become the outer layer at a second region, and
wherein each of the plurality of surfaces forms first and second juxtaposed internal surfaces that are slideably moveable relative to one another in order to effect the power of the optical body.
2. A method as in claim 1 , wherein the energy source is a laser.
3. A method as in claim 2 , wherein the laser forms the one or more concentric internal layers without affecting the outer surface.
4. A method as in claim 1 , wherein the energy source is a femtosecond laser having a wavelength in the range of about 1100 nm to about 1200 nm.
5. A method as in claim 1 , wherein the intraocular lens is adapted to undergo a power change of approximately 0.5 diopters to approximately 5 diopters.
6. A method as in claim 1 , wherein the first and second juxtaposed internal surfaces are in direct contact and slideable relative to each other.
7. A method as in claim 1 , further comprising separating the first and second juxtaposed internal surfaces by a solid, liquid, or gas medium.
8. A method as in claim 7 , wherein the medium is hydrogel or silicone oil.
9. A method as in claim 8 , wherein the medium and the optical body have identical refractive indices.
10. A method as in claim 1 , wherein at least one property of the one or more concentric internal layers is adapted to maximize an amount of shape change in one or more locations of the lens.
11. A method as in claim 10 , wherein the at least one property is a thickness of one internal layer relative to another internal layer.
12. A method as in claim 10 , wherein the at least one property is a Young's modulus of one internal layer relative to another internal layer.
13. A method as in claim 10 , wherein that at least one property is a position of one internal layer relative to another internal layer.
14. A method as in claim 1 , wherein the optical body further comprises one or more chambers filled with a flowable material.
15. A method as in claim 1 , wherein the outer layer is stiffer than the one or more concentric internal layers at the first region.
16. A method as in claim 1 , wherein the optical body is adapted to be implanted within a capsular bag of a human eye.