I have fired rifles with scopes on them and I didn't have my eye on the scope itself. It was set up so that I could look through it and see most effectively with my eye 2-3 inches behind the scope. I was able to fire the rifle without moving my head before firing. It worked better when I was able to keep my eye on the target as far into the motion of my trigger finger as possible until I probably flinched reflexively. Just my two cents.