Have you ever tried the old trapshooters trick for the eye dominance- if you are right handed, but have a dominant left eye-find a focal point with your shooting glasses on and then try Scotch tape until you find the right spot on the left lens- keeps you from the "false leads" on the right to lefties, but still allows better depth perception. A good friend does this and it has helped him greatly.

I have at age 68 20/20 distance vision, a real blessing for an avid shooter indeed. I haven't always worn ear muffs, but always wear shooting glasses, even when bird hunting, and safety glasses when using a chain saw or other power tools. When I was younger I took good eyesight for granted- now I see my friends with similar problems. I do use 1X "cat-eyes" glasses for reading fine print-

I think we have have physical 'quirks' when it comes to our senses- in my case, I can't squint closed my left eye- the few times I target shoot with a handgun, I partially squint my right eye and move the weapon over to my left eye side, to get clarity with the Eliason target sights on my Colts. When I shoot my rifles or shotguns, I always keep both eyes open.

I can't speak much about release triggers, but would they be adaptable to a side-by-side shotgun, whether a single trigger or a double triggered set-up? On a SBT or any single shot, yes- but only for a clays target gun.