Two-part accommodating intraocular lens device

Abstract

A two-part accommodating intraocular lens (IOL) device for implantation in a capsular bag of a patient's eye. The IOL device includes a primary lens assembly and a power changing lens. The primary lens assembly includes a fixed lens and a peripherally disposed centration member. The centration member has a circumferential distal edge and a first coupling surface adjacent the circumferential distal edge. The power changing lens has an enclosed, fluid- or gel-filled lens cavity and haptic system disposed peripherally of the lens cavity. The haptic system has a peripheral engaging edge configured to contact the capsular bag and a second coupling surface. The first and second coupling surfaces are in sliding contact with one another to permit movement of the power changing lens relative to the primary lens assembly and also to maintain a spaced relationship between the fixed lens and the lens cavity during radial compression of the power changing lens.

1 . (canceled) 
     
     
         2 . A two-part accommodating intraocular lens (IOL) device for implantation in a capsular bag of a patient's eye, the IOL device comprising:
 a power changing lens comprising a chamber disposed between a first wall and a second wall of the power changing lens, the chamber having a fluid or gel disposed therein, a central portion of each of the first wall, the second wall, and the chamber intersected by an optical axis of the power changing lens, the power changing lens having a haptic system extending from an inner portion disposed adjacent to the first wall and the second wall to an outer surface disposed a first radial distance from the optical axis and being configured to engage an equator of the capsular bag of the patient's eye when implanted, the haptic system comprising an engagement projection disposed adjacent to the outer surface on a same side of the power changing lens as one of the first wall or the second wall, the engagement projection having an inward portion facing toward the optical axis; and   an intraocular lens comprising a fixed power lens disposed centrally within three centration members, the three centration members extending away from the fixed power lens, the three centration members having a radial outward edge disposed a second radial distance from the optical axis, the second radial distance being less than the first radial distance;   wherein the engagement projection is configured to constrain movement of the intraocular lens when the radial outward edge of the intraocular lens is disposed within or adjacent to the inward portion of the engagement projection.   
     
     
         3 . The two-part accommodating IOL device of  claim 2 , wherein the three centration members are equally disposed around a periphery of the fixed power lens. 
     
     
         4 . The two-part accommodating IOL device of  claim 2 , wherein the first wall and the engagement projection are disposed on a same side of the power changing lens opposite the second wall, the engagement projection extending a greater distance along a direction corresponding to the optical axis than does an exterior surface of the first wall, wherein a recess is formed by the haptic system between the inward portion of the engagement projection and the first wall, the recess being exterior to the chamber and disposed along the optical axis. 
     
     
         5 . The two-part accommodating IOL device of  claim 2 , wherein the inward portion comprises a radially-inwardly facing receiving structure. 
     
     
         6 . The two-part accommodating IOL device of  claim 5 , wherein the radially-inwardly facing receiving structure comprises an inwardly facing concave structure. 
     
     
         7 . The two-part accommodating IOL device of  claim 6 , wherein the inwardly facing concave structure comprises a hook. 
     
     
         8 . The two-part accommodating IOL device of  claim 5 , wherein the radial outward edge of each of the three centration members is configured to mate with a corresponding radially-inwardly facing receiving structure. 
     
     
         9 . The two-part accommodating IOL device of  claim 5 , wherein the radially-inwardly facing receiving structure overlaps a portion of a first side of and a portion of a second side of one of the three centration members when the radial outward edge of the one of the three centration members is disposed in the radially-inwardly facing receiving structure of the power changing lens. 
     
     
         10 . The two-part accommodating IOL device of  claim 5 , wherein one of the three centration members comprises a thicker portion having a thickness that is greater than an adjacent portion of the one of the three centration members, the thicker portion facilitating engagement with the radially-inwardly facing receiving structure. 
     
     
         11 . The two-part accommodating IOL device of  claim 2 , wherein a thickness of the haptic system at or adjacent to the outer surface of the power changing lens as measured in a direction corresponding to the optical axis is substantially thicker than a thickness of the radial outward edge of the three centration members. 
     
     
         12 . The two-part accommodating IOL device of  claim 2 , wherein at least one of the first wall and the second wall of the power changing lens is configured to actuate along the optical axis toward the engagement projection in response to compression of the capsular bag of an eye in which the two-part accommodating IOL device is disposed. 
     
     
         13 . The two-part accommodating IOL device of  claim 2 , wherein at least one of the first wall and the second wall of the power changing lens is configured to be displaced along the optical axis toward the fixed power lens of the intraocular lens in response to compression of the capsular bag when implanted in the capsular bag. 
     
     
         14 . The two-part accommodating IOL device of  claim 2 , wherein the three centration members comprise an inner portion disposed along a periphery of the fixed power lens opposite the radial outward edge, each of the three centration members being tapered from the inner portion of the centration member toward the radial outward edge. 
     
     
         15 . The two-part accommodating IOL device of  claim 2 , wherein at least one of the three centration members comprises a first side, a second side opposite the first side, and a boundary having an inner portion disposed along a periphery of the fixed power lens, an outer portion disposed opposite the inner portion of the boundary and extending along the radial outward edge, a first circumferential edge extending from the inner portion of the boundary to the outer portion, a second circumferential edge opposite the first circumferential edge, the second circumferential edge extending from the inner portion of the boundary to the outer portion and a passage disposed along the boundary extending from the first side to the second side. 
     
     
         16 . The two-part accommodating IOL device of  claim 15 , wherein the passage comprises a U-shaped space extending from the first side to the second side. 
     
     
         17 . The two-part accommodating IOL device of  claim 15 , wherein the passage is disposed at the radial outward edge of the at least one of the three centration members. 
     
     
         18 . The two-part accommodating IOL device of  claim 2 , wherein each of the three centration members comprises a passage disposed along a boundary of a corresponding one of the three centration members from a first side of the corresponding one of the three centration members to a second side of the corresponding one of the three centration members. 
     
     
         19 . The two-part accommodating IOL device of  claim 2 , wherein the first wall and the second wall of the power changing lens are configured to actuate towards and/or away from each other when the outer surface is compressed. 
     
     
         20 . The two-part accommodating IOL device of  claim 2 , wherein a thickness of the first wall and/or the second wall on opposing sides lens chamber along the optical axis is less than one-half a thickness of the fixed power lens. 
     
     
         21 . A method of implanting an intraocular lens assembly in a patient's eye, the method comprising:
 inserting a power changing lens into the patient's eye through an incision, the power changing lens having an outer surface centered on an optical axis of the power changing lens and a peripheral projection adjacent to the outer surface;   positioning the power changing lens in the patient's eye such that the outer surface of the power changing lens is engaged with a portion of a capsular bag coupled with zonules in the patient's eye;   inserting an intraocular lens through the incision, the intraocular lens comprising a fixed power lens disposed centrally relative to three radial centration members, the three radial centration members extending radially away from the fixed power lens; and   constraining movement of the intraocular lens adjacent to the outer surface of the power changing lens by disposing a peripheral edge of each of one of the three radial centration members of the intraocular lens in proximity to or in contact with the peripheral projection of the power changing lens.