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

A single eye focus on things close or far by [changing the shape of your cornea](https://www.aao.org/museum-education-healthy-vision/how-does-eye-focus). If the focal point is in front or behind our retina, the image will be out of focus and look blurry. That’s how we know if things are close or far, by focusing the lense of your eye and feeling how much.

How do none of the top answers mention this? It’s the main way we detect distance with one eye, all the other answers are secondary.