Accommodating intraocular lens system having spherical aberration compensation and method

Abstract

An accommodating intraocular lens includes an optic portion, a haptic portion. The optic portion of the lens includes an actuator that deflects a lens element to alter the optical power of the lens responsive to forces applied to the haptic portion of the lens by contraction of the ciliary muscles and a secondary deflection mechanism. Movement of the lens element by the actuator causes the lens element to deform and the secondary deflection mechanism causes the lens to further deform.

What is claimed is: 
     
         1 . An accommodating intraocular lens, comprising:
 an optic portion including an anterior lens element, a posterior surface, and an optic fluid chamber, the anterior lens element comprising a secondary deflection mechanism that includes a portion of the anterior lens element with a variable thickness;   a haptic with a haptic fluid chamber in fluid communication with the optic fluid chamber;   a fluid disposed in the optic fluid chamber and the haptic fluid chamber;   wherein the anterior lens element is adapted to deform in response to movement of the fluid between the haptic fluid chamber and the optic portion fluid chamber; and   wherein the second deflection mechanism deforms the anterior lens element to an aspheric shape in response to movement of the fluid from the haptic fluid chamber to the optic fluid chamber.   
     
     
         2 . The accommodating intraocular lens of  claim 1 , wherein the haptic has an oval configuration. 
     
     
         3 . The accommodating intraocular lens of  claim 1 , wherein the haptic has a proximal portion secured to the optic portion and a free distal portion disposed away from the proximal end, wherein a radially innermost surface of the haptic, from the proximal portion to the free distal portion, follows a curved radially-outermost peripheral surface of the optic portion.