I have helped shooters for years in the military and 4-H. If your son is right handed, shoot right handed. I have seen The challenge of eye dominance at an early age cause all kinds of frustration. As they get older I have seen the eye dominance change to the dominant hand. Midway and Amazon have inexpensive flip up patches that will clip to shooting glasses. My son had the no dominance. It seemed to change every time we checked him, so we went with the patch and he has done great.