Zero Parallax Visual Axis Glasses For Corneal Pre-Marking

Abstract

Zero parallax visual axis glasses for corneal pre-marking include a target light, an alignment light, a polarized lens and a short pass filter. In some embodiments the targeting light and/or alignment light are LEDs and/or configured to blink. In some embodiments the target light is red. In certain embodiments the alignment light is white. The polarized lens can be placed on a user's non-dominant eye and block light originating from the target light and/or alignment light. The short pass filter can be configured to allow light from the target light to only pass through in one direction.

What is claimed is: 
     
         1 . A pair of zero parallax visual axis glasses for corneal pre-marking comprising:
 (a) a target light;   (b) an at least one alignment light; and   (c) a short pass filter,
 wherein said target light and said at least one alignment light allow for alignment of the visual axis of a user with the visual axis of a human subject. 
   
     
     
         2 . The pair of zero parallax visual glasses of  claim 1 , further comprising:
 (d) a polarized lens.   
     
     
         3 . A pair of pre-marking glasses comprising:
 (a) a target light;   (b) an at least one alignment light, wherein said at least one alignment light is centrally aligned with the visual axis of a user when focused on the cornea of a human subject;   (c) a polarized lens; and   (d) a short pass filter.   
     
     
         4 . The pre-marking glasses of  claim 3 , wherein said target light is an LED. 
     
     
         5 . The pre-marking glasses of  claim 4 , wherein said target light is configured to blink. 
     
     
         6 . The pre-marking glasses of  claim 3 , wherein said at least one alignment light is an LED. 
     
     
         7 . The pre-marking glasses of  claim 6 , wherein said at least one alignment light is configured to blink. 
     
     
         8 . The pre-marking glasses of  claim 3 , wherein said polarized lens is configured for placement over a user's non-dominant eye. 
     
     
         9 . The pre-marking glasses of  claim 3 , wherein said polarized lens is configured to block light originating from said alignment light. 
     
     
         10 . The pre-marking glasses of  claim 3 , wherein said polarized lens is configured to block light originating from said target light. 
     
     
         11 . The pre-marking glasses of  claim 3 , wherein said short pass filter is configured to prevent light originating from said target light from reaching a user. 
     
     
         12 . The pre-marking glasses of  claim 3 , wherein said pre-marking glasses are configured to fit over a pair of traditional prescription glasses. 
     
     
         13 . The pre-marking glasses of  claim 3 , further comprising:
 (e) a video camera.   
     
     
         14 . The pre-marking glasses of  claim 3 , wherein said target light is activated via voice control. 
     
     
         15 . A pair of zero parallax visual axis glasses for corneal pre-marking comprising:
 (a) a target light,   (b) four alignment lights, wherein said alignment lights are centrally aligned with the visual axis of a user when focused on the cornea of a human subject; and   (c) a polarized lens.   
     
     
         16 . The pair of zero parallax visual glasses of  claim 15 , wherein said four alignment lights are configured to form a cross. 
     
     
         17 . The pair of zero parallax visual glasses of  claim 15 , wherein said target light is an LED. 
     
     
         18 . The pair of zero parallax visual glasses of  claim 17 , wherein said target light is configured to blink. 
     
     
         19 . The pair of zero parallax visual glasses of  claim 15 , further comprising:
 (d) a short pass filter.   
     
     
         20 . The pair of zero parallax visual glasses of  claim 19 , wherein said short pass filter is configured to prevent light originating from said target light from reaching the eyes of said user.