We have two eyes to see ,it is enough only one eye to see things,then why nature has given us two eyes.Objects are three dimensional and they are length,breath and height or thickness or depth.If we have only one eye then we can see the length and breath of the objects only and we will not be able to realize the thickness of the object .Since we are provided with two eyes the same image is viewed by both eyes and the similar images received by both eyes are super imposed in brain and we realize the thickness of the object.Also the one in front and the other in back is also viewed correctly because of our binocular vision. My explanation so for can be experimentally proved to you that if you close one of your eye by your hand and view the object in front of you by one of your eye only then you will not be able to feel the thickness of that particular object and if you remove your hand from closure of one of your eye and now if you view the same object by both of your eyes then the difference between viewing by one eye and two eyes and the importance of binocular view can be felt.
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