Wow, this could be a tough topic. I have been prescribing glasses for shooters and thrthfully, there is no one answer to everyone's needs. It's best to be able to take an unloaded gun to the exam with you for the best results. For competitive shooting, I like to adjust the sighting eye to the front sight and the other to distance. I also like to move the optical centers up a few mm because we tilt our heads down when we shoot. Some folks struggle with this because they can not dissociate their eyes. Generally, the less difference between the distance and front sight prescription, the easier it is to adjust. For skeet, I just do both eyes at distance since we point those. I have experimented with many glasses and so far, I like the pallet gas can. It covers the entire eye and gives great coverage. As another poster said, it's best to find an optometrist who is a shooter. There are a few of us around.