I am having a hard time focusing on my front sight when trying to shoot with both eyes open. When I look at the sights in line with both eyes open the front sight doubles or becomes fuzzy. I do not wear glasses but do when reading and I have tried focusing on my sights with my reading glasses on and I still have the same problem. I have read that the best method for shooting a pistol and getting a good sight picture is to have both eyes open. I do OK when using my dominant eye only but would like to learn with the best method. Any suggestions ?