Stable anterior chamber phakic lens

Abstract

An anterior chamber phakic lens made from a foldable, highly biocompatible material that has a very low haptic compression force and low axial displacement, yet is stable in the anterior chamber.

We claim:  
     
         1 . An intraocular lens, comprising: 
 a) an optic having a diameter; and    b) at least one pair of footplates, the footplates being separated by a haptic and attached to the optic by a stem,    wherein the intraocular lens exhibits a force response of approximately less than 0.5 mN when the intraocular lens is compressed 1 mm.    
     
     
         2 . The lens of  claim 1  wherein the footplates are separated by the haptic by less than 1.5 times the diameter of the optic.  
     
     
         3 . The lens of  claim 1  wherein the footplates are separated by the haptic by approximately 1.3 times the diameter of the optic.  
     
     
         4 . The lens of  claim 1  wherein the lens is capable of being rolled or folded so as to fit through a 3.5 mm or less surgical incision.  
     
     
         5 . The lens of  claim 1  wherein an axial vaulting of the lens is less than 1.5 mm when the lens is compressed 1 mm.  
     
     
         6 . The lens of  claim 5  wherein the axial vaulting of the lens is less than 1.0 mm when the lens is compressed 1 mm.  
     
     
         7 . The lens of  claim 1  wherein the lens is made in a single piece entirely from a soft acrylic.  
     
     
         8 . The lens of  claim 1  wherein the lens is made in a single piece entirely from silicone.  
     
     
         9 . The lens of  claim 1  wherein the lens is made in a single piece entirely from a hydrogel.  
     
     
         10 . An intraocular lens, comprising: 
 a) an optic having a diameter; and    b) a pair of footplates, each of the footplates being separated by a haptic and attached to the optic by a ramp, the optic, footplates and ramps being made in a single piece entirely from a soft acrylic,    wherein the intraocular lens exhibits a force response of approximately less than 0.5 mN when the intraocular lens is compressed 1 mm.    
     
     
         11 . The lens of  claim 10  wherein the footplates are separated by the haptic by less than 1.5 times the diameter of the optic.  
     
     
         12 . The lens of  claim 10  wherein the footplates are separated by the haptic by approximately 1.3 times the diameter of the optic.  
     
     
         13 . The lens of  claim 10  wherein the lens is capable of being rolled or folded so as to fit through a  3 . 5  mm or less surgical incision.  
     
     
         14 . The lens of  claim 10  wherein an axial vaulting of the lens is less than 1.5 mm when the lens is compressed 1 mm.  
     
     
         15 . The lens of  claim 14  wherein the axial vaulting of the lens is less than 1.0 mm when the lens is compressed 1 mm.