I tried Warren, but I cant't get a good and fast sight picture that way. It indeed ads stress to keep one eye closed. I can't read a newspaper with my right eye, my left I is 100% good, which I am real happy about! I can shoot ten shot groups, 2" or smaller at 10 meters/11 yards all day long. On 25 meter I can get them all in the black, mostly in the 9 circle (using both hands), so I can't complain, but I would love to have a good right eye.