In point shooting with both eyes open, at least how my agency trained me, you don’t actually look at the sights but just over the sights. I’m pretty good at getting on the target up to about 15 yards with a Glock 35. Beyond that, I need to use my sights. But even then, I shoot with both eyes open and I just learned to kind of prioritize my dominant eye by squinting my weak eye just a bit. I still have full vision, but the weak eye “duplicate image” mostly disappears.