Accommodating intraocular lens system and method
View Patent ↗An accommodating intraocular lens is provided having optical parameters that are altered in-situ, wherein an optic portion of the lens includes a lens piston that alters the shape of a lens element of the lens to alter the optical power of the lens, responsive to forces applied to a haptic portion to the lens by contraction of the ciliary muscles. Forces applied to the haptic portion are concentrated by the lens piston to provide a greater dynamic range, and may be further augmented by the use of haptic pistons disposed in the haptic portion of the lens.
1. An intraocular lens configured for implantation in a capsule following extraction of a lens, the intraocular lens being configured and adapted to accommodate in response to contraction of a patient's ciliary muscles, the intraocular lens comprising:
a substrate having a portion defining a fluid channel;
a lens element;
an actuator layer interposed between the lens element and the substrate, the actuator layer having at least one lens piston disposed in contact with the lens element, the lens piston coupled in fluid communication with the fluid channel;
a haptic portion having a reservoir coupled in fluid communication with the fluid channel; and
a fluid disposed in the lens piston, fluid channel and reservoir,
wherein a transfer of fluid from the reservoir to the lens piston to deflect the lens element is induced in response to movement of the patient's ciliary muscles.
2. The intraocular lens of claim 1 wherein the lens piston is disposed in the center of the actuating layer.
3. The intraocular lens of claim 1 wherein the lens element has a non-uniform radial thickness selected to maintain a desired degree of optical correction throughout a range of deflection of the lens element.
4. The intraocular lens of claim 1 wherein the fluid has a refractive index substantially the same as a refractive index of the lens element, substrate and actuator layer.
5. The intraocular lens of claim 4 wherein the haptic portion comprises at least one haptic piston.
6. The intraocular lens of claim 5 wherein the haptic piston comprises:
a diaphragm disposed in contact with the fluid to define a flexible boundary of the reservoir; and
a force-concentrating element operatively associated with the diaphragm configured and adapted to communicate forces from the ciliary muscles to the diaphragm.
7. The intraocular lens of claim 6 wherein the force concentrating element is disposed in contact with the diaphragm.
8. The intraocular lens of claim 6 wherein the force concentrating element is coupled to the diaphragm.
9. The intraocular lens of claim 8 wherein the force concentrating element comprises a segment slidably disposed in an extension of the substrate.
10. The intraocular lens of claim 1 wherein the haptic portion further comprises one or more flanges that are configured and adapted to apply tension to the capsule.
11. The intraocular lens of claim 1 wherein the haptic portion comprises two or more arms extending from the substrate.
12. An intraocular lens comprising:
an optic portion having a lens element;
a haptic portion coupled to the optic portion;
an actuator layer disposed in the optic portion, the actuator layer including a lens piston;
a reservoir disposed in the haptic portion, the reservoir in fluid communication with lens piston;
a fluid disposed in the lens piston and reservoir,
wherein forces applied to the haptic portion move fluid between the reservoir and the lens piston to control expansion of the lens piston, expansion of the lens piston deflecting the lens element.
13. The intraocular lens of claim 12 wherein the optic portion comprises optically transparent materials.
14. The intraocular lens of claim 12 wherein the lens element has a thickness selected to maintain a desired degree of optical correction throughout a range of deflection of the lens element.
15. The intraocular lens of claim 12 further comprising a substrate including a portion defining a fluid channel that couples the haptic portion to the lens piston.
16. The intraocular lens of claim 12 wherein the lens element is an anterior lens element and the optic portion further comprises a posterior lens element.
17. The intraocular lens of claim 16 wherein the posterior lens element is integrally formed with the substrate.
18. The intraocular lens of claim 12 wherein the fluid has a refractive index substantially the same as a refractive index of the lens element and actuator layer.
19. The intraocular lens of claim 12 wherein the haptic portion comprises at least one haptic piston.
20. The intraocular lens of claim 19 wherein the haptic piston comprises:
a diaphragm disposed in contact with the fluid to define a flexible boundary of the reservoir; and
a force-concentrating element operatively associated with the diaphragm configured and adapted to communicate forces from the ciliary muscles to the diaphragm.
21. The intraocular lens of claim 20 wherein the force concentrating element is disposed in contact with the diaphragm.
22. The intraocular lens of claim 20 wherein the force concentrating element is coupled to the diaphragm.
23. The intraocular lens of claim 22 wherein the force concentrating element comprises a segment slidably disposed in an extension of the substrate.
24. The intraocular lens of claim 12 wherein the haptic portion further comprises one or more flanges that are configured and adapted to apply tension to the capsule.
25. The intraocular lens of claim 12 wherein the haptic portion comprises two or more arms extending from the substrate.
26. The intraocular lens of claim 12 further comprising a valve that transitions the intraocular lens to an unaccommodated state.
27. The intraocular lens of claim 1 further comprising a valve that transitions the intraocular lens to an unaccommodated state.