I've been shooting SS for about 4 years, due to astigmatism I was seeing an enlongated front site. Plus at 60+ it was fuzzy. One eye Dr. had me in a contact, right eye only, with a 1.25 reader lens for close up. Cleared things up nicely but tended to give me a headache if worn all day. Now I just wear a contact to correct the astigmatism, front sight is a little fuzzy but I can live with it. My boys are suggesting I go to open, thinking about it.