Zelazny, that cross dominance is a point that came home to me about 20 years ago when I finally broke down and got contacts. My eyes are BAD, like 20/600. I have to have glasses on just to shave.

On my old glasses, the lenses were so thick that I wound up looking through the edge of the lense and was actually seeing the target with my left eye instead of the dominant right eye. So, the left eye became the dominant eye when I was at full draw. But, since I got glasses when I was 12, I grew up shooting that way and never actually knew I was doing that. I was pretty darn good too!

When I got contacts, it took me a solid month of hard shooting before I got used to the new sight picture and learned how to put my arrows on center instead of nearly a foot right at 20 yards. I almost always wear contacts to shoot now, but sometimes I still have to wear my specs. But even these newfangled slimline lenses are still thick and distort my vision at the edge of the lense, so I have to make a conscious effort to turn my face square to the target so I can see thru the right lense.