I'm sorry I wasn't clear. Like dieterrams said, I just meant that when you lose sight in one eye, loss of peripheral vision is probably more impairing overall than the loss of binocular parallax.
If your depth perception was truly devastated by losing one eye (as the article implied by calling binocular disparity the most important facility for depth perception), losing eye would be a lot more handicapping than it is in my experience (I know several people with only one eye, one of whom is a pretty good casual volleyball player).
If your depth perception was truly devastated by losing one eye (as the article implied by calling binocular disparity the most important facility for depth perception), losing eye would be a lot more handicapping than it is in my experience (I know several people with only one eye, one of whom is a pretty good casual volleyball player).