Lens system and method for power adjustment
View Patent ↗A lens is provided that having optical parameters that may be adjusted in-situ, and is particularly useful as an IOL for use in cataract patients that require an adjustment in the optical power of the lens post-implantation. In one embodiment, the lens body carries an array of interior fluid-filled cells in which fluid is controllably moved upon application of energy from an external source to move a fluid media into or out of the cells to thereby alter the lens surface shape.
1. A lens comprising:
a lens portion defining an anterior surface layer and a posterior surface layer;
at least one deformable cell interposed between the anterior surface layer and the posterior surface layer so that deflection of the deformable cell induces a corresponding deflection of either the anterior surface layer or the posterior surface layer, the deformable cell defining an adjustable volume of a fluid therein;
a haptic portion having a fluid reservoir; and
a configurable passageway interposed between the fluid reservoir and the deformable cell, reconfiguration of the passageway adjusting the volume of fluid in the deformable cell.
2. The lens of claim 1 wherein the lens portion had an optical axis along which light travels through the lens, the configurable passageway disposed outside the optical axis.
3. The lens of claim 2 wherein the fluid has an index of refraction matched to the index of refraction of the deformable cell.
4. The lens of claim 3 wherein the configurable passageway mediates pressure differentials between the deformable cell and the reservoir.
5. The lens of claim 4 further comprising a second reservoir disposed in the haptic portion.
6. The lens of claim 5 wherein the second reservoir is has a lower internal pressure than an internal pressure of the reservoir.
7. The lens of claim 6 wherein the deformable cell has a round or hexagonal cross-section.
8. A lens comprising:
an optic portion;
a haptic portion;
at least one deformable cell;
a reservoir in haptic portion; and
a configurable passageway interposed between the deformable cell and the reservoir to control fluid flow into or out of the deformable cell to thereby controllably deform and alter an optical parameter of the lens.
9. The lens of claim 8 wherein the deformable cell is disposed in the optic portion.
10. The lens of claim 9 wherein the fluid has an index of refraction matched to an index of refraction of the optic portion.
11. The lens of claim 10 wherein the optic portion has an optical axis and the configurable passageway is disposed outside the optical axis.
12. The lens of claim 11 wherein the configurable passageway mediates pressure differentials between the deformable cell and the reservoir.
13. The lens of claim 12 wherein the haptic portion is configured to engage a lens capsule in the eye of the living organism.
14. The lens of claim 13 further comprising a second reservoir.
15. The lens of claim 14 wherein the second reservoir is disposed in the haptic portion.
16. The lens of claim 15 wherein the deformable cell is round or hexagonal.