>>12514205Now do it with one eye.
Good luck.
Your brain does parallax on the fly, you don't even have to consciously think about it.
That is an evolutionary advantage of compartmentalized brains.
The computation required to perform depth perception is probably significant, thus if you had to use your forebrain for it, consciously, your reaction times would be abysmal, even if you were more precise.
If you're trying to throw a spear into a mastodon at 80 meters, you need fast timing, in case it moves.
Snipers are humans that utilize our natural ability to perform parallax, but then also consciously use part of their forebrain as well.
They have become the best of both worlds, giving them an advantage over any average idiot that picks up a gun.
