Saw this via Mas Ayoob.
Eyes Wide Shut
You HAVE to keep BOTH eyes WIDE OPEN, or you will DIE!!!! Ok, skippy. If you can’t hit the target with both eyes open, you might as well have your eyes wide shut. I would much rather you close an eye and get the hit quick, than to keep them both open and miss. Well, you have to shoot a pistol mounted optic with both eyes open. No, no you don’t. Some people have to close an eye to shoot, regardless of what sighting system they use. Some people have to even squint an eye. If that is what it takes to get quick, accurate hits, then do it, and don’t pay any attention to what someone what has not seen the world through your eyes has to say.
There is plenty more in the link. Agree or disagree if you wish, but I laughed and was constantly nodding my head.