I'm left eye dominant. Strongly. I shut my left eye when I mount the gun to shoot. I prefer the sxs, but I don't know that it really helps me shoot any better than an OU. I've been doing it long enough that I don't mind the L eye dominance. But I wish that the vision in my R eye were as good as my L. Not a big deal since I had macular pucker taken care of, but on occasion I will lose a target (or a bird) against a dark background, like trees.