How are we able to see in 3D? I mean could you explain to me in detail how we are able to put together two 2D images to get a 3D image?

Question

And what do we need to see the world in 4D? Or why aren’t we able to see in 4D?

In: Biology

Answer 1

What we “see” in 3D is effectively depth (distance from us). When you look at something, there’s a triangle between it and your eyes. Your brain uses those angles to estimate distance.

In a sense, when you estimate the motion of a moving object, you’re also “seeing” the 4th dimension.