I'm new around here, first post in fact For some reason I have always shot with one eye. I think this is what I was taught. Goes for any kind of shooting, guns, bows, slingshots, but not grenades or spears. I have started to try and use both eyes in the last year and it is strange but sometimes goes smoothly. For example the instinctive aspect is just great for me with both eyes.For those long distance or tight shots I still find myself using one eye.I wish I would have learned to use both eyes. I beleive that way is better. Might be the reason I have one eye the size of a golfball and one the size of a marble.