If depth perception works because the brain checks the difference in the position of the object between the two eyes and concludes how far away it is, how can we still see depth when one eye is closed?

Question

If depth perception works because the brain checks the difference in the position of the object between the two eyes and concludes how far away it is, how can we still see depth when one eye is closed?

In: 3602

Answer 1

As someone who only has one good eye (my left eye has a very narrow field of vision, I can actually see further to the left with my right eye than my left eye), I use various tricks like shadows, known size vs apparent size, movement, etc to judge depth. This works fine for normal everyday tasks, but where I started to notice problems is driving. I have no real depth perception, and I just can’t judge depth well enough at vehicle speeds so I don’t drive.