Corrective sight for firearms

Abstract

A method for assisting a firearm user with a vision condition includes: (a) fitting a housing on the firearm, the housing at least partially enclosing an aiming indicia including (1) a rear sight having two spaced apart sight elements defining a rear sight gap and (2) a front sight configured to be aligned with the rear sight gap, wherein the rear sight sight elements and the front sight each include a transparent optical lens disposed on a rear side, and wherein each optical lens has a positive optical power configured to provide substantially clear vision of the aiming indicia when viewed through the optical lens; and (b) assisting the firearm user with a vision condition by aiming the firearm at a target to bring into focus the rear sight and the front sight at the rear sight gap.

What is claimed is: 
     
         1 . A method for assisting a firearm user with a vision condition, comprising:
 fitting a housing on the firearm, the housing at least partially enclosing an aiming indicia comprising (1) a rear sight having two spaced apart sight elements defining a rear sight gap and (2) a front sight configured to be aligned with the rear sight gap, wherein the rear sight sight elements and the front sight each include a transparent optical lens disposed on a rear side, and wherein each optical lens has a positive optical power configured to provide substantially clear vision of the aiming indicia when viewed through the optical lens; and   assisting the firearm user with a vision condition by aiming the firearm at a target to bring into focus the rear sight and the front sight at the rear sight gap.   
     
     
         2 . The method of  claim 1 , comprising retrofitting the housing onto the firearm. 
     
     
         3 . The method of  claim 1 , wherein the optical lens comprises a polarization region. 
     
     
         4 . The method of  claim 3 , further comprising providing polarized eyewear to the firearm user, wherein the polarized eyewear cooperates with the polarization region of the optical lens to provide substantially clear vision to the firearm user. 
     
     
         5 . The method of  claim 1 , wherein the positive optical power brings an image of the aiming indicia in focus at a retina of an eye of a user of the firearm when the user views the aiming indicia through the optical lens, thereby assisting the firearm user with the vision condition. 
     
     
         6 . The method of  claim 1 , wherein the optical lens comprises one or more of a convex lens, a plano-convex lens, or a converging lens. 
     
     
         7 . The method of  claim 1 , wherein the optical lens comprises a first region and a second region, the first region having the positive optical power and the second region having an optical power less than the positive optical power of the first region and greater than or equal to zero. 
     
     
         8 . The method of  claim 7 , wherein the first region comprises a lower region of the optical lens relative to the firearm and the second region comprises an upper region of the optical lens relative to the firearm. 
     
     
         9 . The method of  claim 7 , wherein the first region comprises a first material and the second region comprises a second material different than the first material. 
     
     
         10 . The method of  claim 1 , wherein the positive optical power is from greater than 0 diopters to 10 diopters. 
     
     
         11 . The method of  claim 1 , further comprising adjusting the optical power to assist the firearm user with the vision condition. 
     
     
         12 . The method of  claim 1 , wherein the vision condition comprises one or more of myopia, hyperopia, presbyopia, and astigmatism. 
     
     
         13 . The method of  claim 1 , wherein the sight element comprises an alignment indicator comprising a two-dimensional or three-dimensional shape or figure. 
     
     
         14 . The method of  claim 13 , wherein the shape or figure comprises a box, a frame, a bar, or a notch. 
     
     
         15 . The method of  claim 1 , wherein the sight element comprises a graphical image. 
     
     
         16 . The method of  claim 1 , wherein the sight element comprises a reticle lens. 
     
     
         17 . The method of  claim 16 , wherein the reticle lens comprises a holographic sight. 
     
     
         18 . The method of  claim 17 , wherein the holographic sight comprises a laser.