I lack the google-fu to find information about correcting for bad sights on a gun. I haven't done any archery in a long time, and my teachers were probably lousy. I can't remember how I hit a bullseye in high school, but it involved amazed classmates so I assume that it was me playing with bow and arrow beforehand and knew what to aim for to get a good shot. I have lived with astigmatism to the point that I only know what a straight line is because I've handled rulers. For those who know archery or target shooting with bad sights, I beg for ideas about how shooting lessons would go. From what I remember, I would have to make instinct-calculations. I would have to begin with how I'm not actually aiming at the target, but adjusting.