Intraocular multifocal lens

Abstract

A multifocal intraocular lens providing greater or lesser refraction in relation to the position of the head and eyes of a user. The lens body is inserted into an artificial capsule bag or into a fluid-filled enucleated natural lens capsule of an eye, wherein the lens body encompasses the optical axis of the eye and by movement of the lens body within the capsule, provides different greater or lesser refraction depending upon the position of the eye.

1 . An intraocular lens, said lens comprising:
 a solid lens body with a top and bottom, having a lower section and an upper section, each section having a front surface and a back surface;   wherein the lower section is substantially semi-circular in cross-section between the front and back surfaces; and   wherein the upper section tapers upward to create a tapering periphery at the top of the lens body, the back surface of the upper section being a concave curve, and the front surface of the upper section being a convex curve.   
     
     
         2 . The lens of  claim 1 , wherein the lens is substantially elliptical when viewed from the front. 
     
     
         3 . The lens of  claim 1 , wherein the back surface of the upper section has at least two radii of curvature. 
     
     
         4 . The lens of  claim 1 , wherein the front surface of the upper section has at least two radii of curvature. 
     
     
         5 . The lens of  claim 1 , wherein the front and back surfaces of the upper section each have at least one radius of curvature, and said at least one radius of curvature of the back surface is shorter than the at least one radius of curvature of said front surface. 
     
     
         6 . The lens of  claim 1 , wherein said lens body is formed of a synthetic material. 
     
     
         7 . The multifocal intraocular lens of  claim 6 , wherein said synthetic material is selected from the group consisting of silicone, acrylic, and polymethylmethacrylate. 
     
     
         8 . The lens of  claim 1 , wherein said lens body has at least one index of refraction. 
     
     
         9 . The lens of  claim 1 , wherein said lens body has multiple indices of refraction. 
     
     
         10 . The lens of  claim 1 , wherein said lower section of said lens body has a greater index of refraction or focusing power than said upper section. 
     
     
         11 . The lens of  claim 1 , wherein said lens body is substantially aspheric. 
     
     
         12 . The lens of  claim 1 , wherein said lens body is colored.