No 100% with you always both eyes open unless you’re in glass. Pistol both eyes open, red dots, holos, even irons on big aperture. If I see someone close their eye to look down a dot I know I have a long day ahead of meRight, but on that particular gun and optic it won't be an issue. I agree with what you said though. There are exceptions for everything but generally on a standard carbine and an EOTech both eyes open will give you an unlimited FOV. I love EOTech's on my AR's for that very reason(and dat reticle tho!).