I put some of my wife's white nail polish on the front sight of my CVA mountain pistol. Sure makes a difference. Gotta do my rifle too.man i am blessed, 63 and can still see like a hawk. i don't even need reading glasses. but on a couple of my rifles i put a dab of white paint on the back of the front blade. it really helps in low light hunting. i killed a deer at about 70yds this year in very low light and it was because i painted the blade or i wouldn't have been able to do it,,,,,,,,,,,