Don't them pro shooters use a eye shield thing over there non dominant eye?I was thinking use a pirate patch.https://www.theshootersbox.com/Eye-Patch--WHITE-Opaque-or-WHITE-Solid-or-BLACK-Solid--Clip-On-Adjustable_p_13938.htmlhttps://www.birchwoodcasey.com/products/off-eye-shooting-optical-filter-fit-kit.html
A m If you like shooting with just your shooting eye , it's easier to just close your non shooting eye . No need to buy filters or patches. Being able to focus on the front sight , if the Brock String helps to keep your eye healthy it a good thing to try , that's all I'm suggesting. Stay Well.Chris
Deeco I think I served with him. He hit everything he shot at. Nick name " Mad Dog"Chris
Earl With your glasses off. Start with the first bead about 4" second around 10 third around arm's length. Helps to concentrate on the front sight for handgun shooting and rifle you can bring the bead out a little further. As we get older most of us don't focus as fast as we use to , it's a way to strengthen your eye muscles. As with all exercise , to do any good you have to get it part of your training schedule.. It can't hurt and it's not expensive to try or even make one if you don't want to buy. Be Well Chris