3D - 2

How does 3d vision in the real world REALLY work?

The usual explanation for our 3d vision is that, having 2 eyes, the crossed result of their slightly different vision creates the 3d effect. However, if I close one eye, I don't experience any sudden flattening of my vision; nor I think that one-eyed people have problems perceiving depth, do they? So, what's the REAL mechanism behind 3d vision?

Public Comments

1. That usual explanation *is* the "REAL" explanation. The reason you don't experience a"flattening" of your vision is because you have a memory. Before you closed your one eye your brain had *already* worked out distances to things based on those slight perspective differences in what both your eyes had seen. If you don't think that one-eyes people have depth perception problems, put on an eyepatch and play catch with somebody. Better yet, wear an eye patch all day, from the moment you get up, and count how many things you misjudge distances to when reaching to pick them up or to catch them when thrown at you.