Multifocal phakic intraocular lens

Abstract

An intraocular lens for use in a mammalian eye having a natural lens, the intraocular lens including a lens body sized and adapted for placement in the eye, and having a baseline optical power and at least one optical add power. The at least one optical add power is reduced relative to the corresponding optical power of a similar intraocular lens adapted for placement in a similar eye in which the natural lens has been removed.

What is claimed is:  
     
         1 . An intraocular lens for use in a mammalian eye having a natural lens, the intraocular lens comprising: 
 a lens body sized and adapted for placement in the eye, and having a baseline optical power and at least one optical add power, the at least one optical add power is reduced relative to the corresponding optical power of a similar intraocular lens adapted for placement in a similar eye in which the natural lens has been removed.    
     
     
         2 . The intraocular lens of  claim 1  which includes a plurality of different optical add powers, each of the different optical add powers being reduced relative to the corresponding optical power of a similar intraocular lens adapted for placement in a similar eye in which the natural lens has been removed.  
     
     
         3 . The intraocular lens of  claim 1  which further comprises a fixation member coupled to the lens body and adapted to facilitate fixating the intraocular lens in the eye.  
     
     
         4 . The intraocular lens of  claim 1  wherein the lens body has a first optical add power for near vision.  
     
     
         5 . The intraocular lens of  claim 4  wherein the lens body has a second optical add power intermediate between the first optical add power and the baseline optical power.  
     
     
         6 . The intraocular lens of  claim 1  wherein the lens body includes a plurality of different regions each having an optical add power.  
     
     
         7 . The intraocular lens of  claim 1  wherein the at least one optical add power is reduced by at least about 10% relative to the corresponding optical power of a similar intraocular lens adapted for placement in a similar eye in which the natural lens has been removed.  
     
     
         8 . The intraocular lens of  claim 1  wherein the lens body is adapted to be placed in an anterior chamber of the eye.  
     
     
         9 . The intraocular lens of  claim 3  wherein the fixation member is adapted to be placed in an anterior chamber of the eye.  
     
     
         10 . The intraocular lens of  claim 1  wherein the lens body is adapted to be placed in a posterior chamber of the eye.  
     
     
         11 . The intraocular lens of  claim 3  wherein the fixation member is adapted to be placed in a posterior chamber of the eye.  
     
     
         12 . The intraocular lens of  claim 1  wherein the lens body is deformable for insertion through a small incision into the eye.  
     
     
         13 . An intraocular lens for use in a mammalian eye including a natural lens having an accommodative capability, the intraocular lens comprising: 
 a lens body sized and adapted for placement in the mammalian eye, and having a baseline optical power and at least one optical add power, the at least one optical add power having a magnitude so that the lens body when placed in the mammalian eye, in combination with the natural lens, provides enhanced vision.    
     
     
         14 . The intraocular lens of  claim 13  which further comprises a fixation member coupled to the lens body and adapted to facilitate fixating the intraocular lens in the eye.  
     
     
         15 . The intraocular lens of  claim 13  wherein the at least one optical add power has a magnitude which is reduced to take account of the accommodation capability of the natural lens.  
     
     
         16 . The intraocular lens of  claim 15  wherein the at least one optical add power includes a near vision optical power.  
     
     
         17 . The intraocular lens of  claim 13  wherein the lens body is adapted to be placed in an anterior chamber of the eye.  
     
     
         18 . The intraocular lens of  claim 14  wherein the fixation member is adapted to be placed in an anterior chamber of the eye.  
     
     
         19 . The intraocular lens of  claim 13  wherein the lens body is adapted to be placed in a posterior chamber of the eye.  
     
     
         20 . The intraocular lens of  claim 14  wherein the fixation member is adapted to be placed in a posterior chamber of the eye.  
     
     
         21 . The intraocular lens of  claim 13  wherein the lens body is deformable for insertion through a small incision into the eye.  
     
     
         22 . A method for treating presbyopia in a mammalian eye including a natural lens, the method comprising: 
 placing in the eye an intraocular lens including a lens body having a baseline optical power and at least one optical add power so that the lens body, in cooperation with the natural lens, provides enhanced vision.    
     
     
         23 . The method of  claim 22  wherein the enhanced vision provided is relative to the vision provided by the eye without the intraocular lens.  
     
     
         24 . The method of  claim 22  wherein the at least one optical add power has a magnitude which is reduced to take account of the accommodation capability of the natural lens.  
     
     
         25 . The method of  claim 22  wherein the at least one optical add power is reduced relative to the corresponding optical power of a similar intraocular lens adapted for placement in a similar eye in which the natural lens has been removed.