Adams has a good point. If you are shooting right handed and are right eye dominant it shouldn't take more than a little practice. If you are in the boat he was in though just do it over and over again until it becomes second nature. I was lucky and just started doing it and never looked back. My friend on the other hand spent a half hour at a techno hunt range hitting the wall. He finally gave up working on the bow when they told him he was using the wrong eye