I have been shooting both eyes open for bout 8 yrs. I talked to some friends at my club was surprised by what I heard. When I shoulder my gun with both eyes open I see two ribs. To counteract this I pull the brim of my cap to block my non dominance eye from seeing the rib yet can still see the field with both eyes. Most shooters said they only see one rib with both eyes open. Also when I focus on an object on the wall with my pointer finger up, I see two fingers. I want to shoot registered targets this year but with shooting glasses, I block my rib with my cap. Also, a piece of tape on the glasses doesn't work, tried it and my eyes get really confused. Do I have no dominant eyes? Really want to shoot registered targets but can't shoot with glasses on.