[RAfiringline]

I think you're best off training with a gun, consistent w/ how you would have to use it - hunting, self defense, competitive event, etc.

That definitely has implications about what corrective lenses you should be wearing at the range.

I always wear distance glasses, and when I'm using iron sights at the range, I concentrate on the front sight, which is always somewhat blurry. I make my front sights fluorescent orange which helps the situation.