Why we have two eyes, what is the difference by looking with one eye and by looking with the two?

What role plays our second eye in our vision?
Answer:
The slightly different angle of view from the two eyes makes it possible for the brain to see three dimensionally.
One eye sees only two dimensions: length and width. The third dimension that is added by having two eyes is depth (or distance).

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Depth and perception I think.

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It makes it a lot easier to judge distances.

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http://www.sciencemuseum.org.uk/on-line/... this should help

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Having two eyes means we can perceive distance and depth. Close one eye and get someone to hold out a pencil at a fair distance and try to grab it, then you'll see why we need two eyes!

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have you seen a cyclops? we would look stupid with only one eye %26 what if we damged our only eye? at least with 2 we have a back up

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depth perception. If you see with one eye, you can't tell distance. 2 eyes give you 3d effect.

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By using two eyes we gain stereophonic vision. The distance from an object to your eye is the same if it is directly in front of you, but is different if it is off to one side. The brain is able to interpret these distances and determine where objects lie in 3d space. With only one eye, it is unable to do this (although it can compensate to an amazing degree)

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you have a bigger peripheral vision by using both eyes

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vision spread (also we would all look like cyclops)

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To admire the body twice.Common knowledge.

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Stereoscopic vision is great for working out how far food is away from us, and for tool making, and for social contacts. Since we are (aparently) smart, and have a great rotating neck, we don't need to have eyes on each side of our heads to look out for trouble.Having two eyes also increases the amount of the world we can seeat any one time, but only slightly. Another bonus is that if one eye is damaged we have a backup.

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The difference and the role is depth perception.

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Because we are descendants from "Primates", if you're going to swing through trees, you'd better have good dimensional depth perception. Stereoscopic vision (2 eyes) provides this ability, otherwise we would not be around today, due to the fact that our skulls would have been crushed, from slamming into tree trunks !

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Monocular vision doesn't give depth perseption, where binocular vision does. Plus, predatory animals have forward facing eyes while prey animals eyes look to the side. Therefore, preditory animals have depth of field vision to judge the distance to their prey. Prey animals lack depth of field, because they only need to know that a preditor is there, not how close, and to run.

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With two eyes you get a three dimensional view of the world, that's why all animals have two eyes. the positioning of your eyes are what are really important.
As you may know sharks have eyes on the sides of their heads, giving them a blind spot straight in front of them.
you would also only be able to see in one direction at one given time, with only one eye.
however i suggest you research the human eye if your really interested.

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It is called depth perception.

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Both your eyes control your perception of depth and distance. Cover one eye and walk outside and you'll notice that you either can determine depth or dimension. Then switch and cover the other eye and you'll notice the other option.

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with two eyes you have a lot more side vision also two eyes together judge distances better and relays that to the brain

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Well both together give you a three dimensional perspective.
It gives you a sense of depth or thickness. Again its the two eyes that help you gauge distances, try kicking at a point on the wall with one eye closed.

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Two eyes gives us distance,you can tell how near or far an object is away from us

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the two eyes together give you almost 180o vision it also give you the ability to assess distance and it also gives you over all clarity, and as some folk have said here, should you lose sight of one eye the other one is always there to come to your aid but that is typical of the human body in general most vital parts are duplicated but perhaps none as important than eyesight and we take it for granted

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Depth perception is absent with one eye

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3D.

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periphereal vision.
o, ya, and GOD MADE IT SO!

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we get to see a larger area at a time

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