Question

We are able to see everything with one eye then why do we have two eyes?.
(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answer 1

Two eyes provide us a wider field of view as a human being has a horizontal field of view of about 150 ° which one eye open and about  180 ° with two eyes open. With two eyes open we can see a much larger and bigger view in front of us. With one eye the world will appear flat to us ,whereas with 2 eyes , dimension of depth is added to our view. Moreover with two eyes we are able to judge the distance of an object accurate.

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Answer 2

A human's eye can provide only 150° vision.
Two eyes are present in human body to enable us to have wider view of 180°.
In addition two eyes provides images from two perspectives or angles to the brain. which is essential for 3d examination of the visual world.

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