Question

why do we have two eyes

Answer 1

While, when you see only with your right eye, the object will look like this. Our eyes send these two slightly different images to the brain. The brain blends or combines both the images to make a three dimensional image of the object.

Answer 2

If we had only one eye the world would have been 2 dimensional. The addition of a second eye introduces a new dimension of depth which makes our view 3 dimensional . It helps us to know how far or near an object is.

Hope it helps;)