Question

why do we see one image when we have two eyes?

Answer 1

If you have two working eyes, you are live streaming two images of the world into your brain. The brain combines the two to produce a view of the world that appears as though you had a single eye. If you're reaching out with your hand, you want to aim not at where things appear 

Answer 2

Our eyes sees the revert image of the object . but our brain revert it to make it normal as they are.