Patent ID: 8500806

Claim:
An intraocular lens for replacement of a natural crystalline lens within a capsular bag during eye surgery, the intraocular lens to be positioned anterior to the retina when implanted in the eye, said intraocular lens comprising: a) an optic adapted to focus light, said optic having an anterior surface, a posterior surface, and a central portion, said optic comprising, i) a polymeric posterior first optic layer having a first durometer, an anterior surface and a posterior surface, said anterior surface having a peripheral portion with a first radius of curvature and a relatively steeper central portion, said posterior surface of said first optic layer defining said posterior surface of said optic, and ii) a polymeric anterior second optic layer having a second durometer less than said first durometer, and including a posterior surface, an anterior surface, and central portion, said posterior surface of said second optic layer bonded flush against said anterior surface of said first optic layer, and said anterior surface of said second optic layer defining said anterior surface of said optic; b) at least one haptic lever extending from said optic, each said haptic lever including a fulcrum attached to said first optic layer, a resistance arm attached to said second optic layer, and a force arm extending from said optic, wherein when a force is applied to rotate said haptic lever on said fulcrum in a posterior direction relative to said second optic layer, i) said resistance arm pulls said second optic layer to deform said second optic layer about said central portion of said first optic layer and steepen a curvature of said anterior surface of said second optic layer, and ii) said optic is axially displaced anteriorly relative to said haptic lever; c) biasing means for biasing said haptic lever to rotate on said fulcrum into a posterior direction relative to said second optic layer into a non-stressed state; and d) a restraining element operating against said biasing means so as to maintain said optic and said at least one haptic lever in a stressed state of relatively greater planarity than said non-stressed state, said restraining element being releasable without an invasive surgical procedure after completion of the eye surgery during which said intraocular lens is implanted, and when said lens is implanted in the eye an optical power of said lens is adjustable in response to stresses induced by the eye.