Two eyes help us gain a stereoscopic vision, i.e., the ability to register and make sense of three-dimensional space from any visual inputs. It also helps us to gain a wider angle, as with one eye, we would be able to see 150° while with both eyes, you get a 180° field of vision.

Do you really need 2 eyes?

At distances greater than arms length we really do not use binocular vision. We can judge depth with one eye or both eyes equally. Depth perception means the ability to determine what is closer to us, but the tools we use to do this vary. Up close the most important one is binocular vision.

Why is it better to have two eyes than one?

How two eyes give you more depth perception, which is the ability to judge how near or far objects are. Hold a pencil lengthwise (on its side) in each hand. ... Two eyes give you better depth perception.