Unreversed prism gonioscopy lens assembly

Abstract

In one embodiment of the present disclosure, a double-reflecting contact lens assembly for viewing the anterior chamber of an eye is provided. The lens assembly includes: (a) a lens body having a contact end defining at least a portion of first surface and a viewing end defining at least a portion of a second surface, wherein the lens body is a prism having an optical axis and magnification in the range of greater than 1× to about 2×; (b) a first reflecting surface disposed adjacent the lens body; and (c) a second reflecting surface disposed adjacent the lens body opposing the first reflecting surface. Other embodiments of the present disclosure include methods of making the lens assembly, methods of use, and a lens and handle assembly.

1 . A double-reflecting contact lens assembly for viewing the anterior chamber of an eye, the lens assembly comprising:
 (a) a lens body having a contact end defining at least a portion of first surface and a viewing end defining at least a portion of a second surface, wherein the lens body is a prism having an optical axis and magnification in the range of greater than 1× to about 2×;   (b) a first reflecting surface disposed adjacent the lens body; and   (c) a second reflecting surface disposed adjacent the lens body opposing the first reflecting surface.   
     
     
         2 . The lens assembly of  claim 1 , wherein the at least a portion of the first surface is contoured to conform to the surface of an eye. 
     
     
         3 . The lens assembly of  claim 1 , wherein the first surface has a contact diameter of less than 11 mm. 
     
     
         4 . The lens assembly of  claim 1 , wherein the first surface has a contact diameter of less than 10 mm. 
     
     
         5 . The lens assembly of  claim 1 , wherein the viewing end is angled relative to the optical axis. 
     
     
         6 . (canceled) 
     
     
         7 . The lens assembly of  claim 1 , wherein the first reflecting surface is angled relative to the optical axis, the angle being in the range of about 22 degrees to about 38 degrees. 
     
     
         8 . The lens assembly of  claim 1 , wherein the second reflecting surface is angled relative to the optical axis, the angle being in the range of +/−10 degrees. 
     
     
         9 . The lens assembly of  claim 1 , wherein the first reflecting surface intersects the contact and viewing ends of the lens body. 
     
     
         10 . The lens assembly of  claim 1 , wherein the first reflecting surface intersects only the viewing end of the lens body. 
     
     
         11 . The lens assembly of  claim 1 , wherein the second reflecting surface intersects the contact and viewing ends of the lens body. 
     
     
         12 . The lens assembly of  claim 1 , wherein the first reflecting surface is substantially planar. 
     
     
         13 . The lens assembly of  claim 1 , wherein the second reflecting surface is substantially planar. 
     
     
         14 . The lens assembly of  claim 1 , further comprising a first outer portion adjacent the first reflecting surface having a contact end defining at least a portion of the first surface and a viewing end defining at least a portion of the second surface. 
     
     
         15 . The lens assembly of  claim 1 , further comprising a first outer portion adjacent the first reflecting surface having a viewing end defining at least a portion of the second surface. 
     
     
         16 . The lens assembly of  claim 15 , further comprising a second outer portion adjacent the second reflecting surface having a contact end defining at least a portion of the first surface and a viewing end defining at least a portion of the second surface. 
     
     
         17 . The lens assembly of  claim 16 , wherein the lens body and the first and second outer portions define a lens assembly having a substantially circular cross-section though a plane perpendicular to the optical axis. 
     
     
         18 . The lens assembly of  claim 1 , further including a beveled edge at the first surface. 
     
     
         19 . The lens assembly of  claim 1 , further including a cut-out portion in the first surface. 
     
     
         20 . The lens assembly of  claim 1 , wherein the lens assembly does not include an outer protective coating. 
     
     
         21 . A double-reflecting contact lens assembly for viewing the anterior chamber of an eye, the lens assembly comprising:
 (a) a lens body having a contact end defining at least a portion of an eye contact surface and a viewing end defining at least a portion of a viewing surface, wherein the lens body is a prism having an optical axis and magnification in the range of greater than 1× to about 1.5×;   (b) a first reflecting surface disposed adjacent the lens body, wherein the first reflecting surface is substantially planar and intersects the viewing end of the lens body;   (c) a second reflecting surface disposed adjacent the lens body opposing the first reflecting surface, wherein the second reflecting surface is substantially planar and intersects the contact and viewing ends of the lens body;   (d) a first outer portion adjacent the first reflecting surface having a contact end defining at least a portion of the eye contact surface and a viewing end defining at least a portion of the viewing surface; and   (e) a second outer portion adjacent the second reflecting surface having a contact end defining at least a portion of the eye contact surface and a viewing end defining at least a portion of the viewing surface, wherein the lens body and the first and second outer portions define a lens assembly having a substantially circular cross-section though a plane perpendicular to the optical axis.   
     
     
         22 - 35 . (canceled)