Oddly enough I face this problem daily. Are we talking pistol or rifle? If it is pistol you can easily resolve with both eyes open and a reflex sight, (red dot). If it is rifle you have two choices shoot with non dominate eye or become a switch hitter and shoot with weak side. It really depends on how bad your eyesight is one side to the other. If you are reasonably close it is frankly easier to shoot weak eye strong hand.
