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

Because our brain has learned that certain appearances mean distance. Lines tend to bend toward a point in the distance (called the vanishing point) when something has depth, and you can see that with one eye. Shadows are also cues, and you can see lighter and darker colors with one eye. Your brain learns these patterns, so you can have a degree of depth perception without both eyes.