An extra EYE

A Golden EYE

An eye creates world

What I SEE .. really exists

 We need eyes but not an eye. The vision perception seems to be double in living beings. I was wondering one day that if there is any living being exists on earth "single eyed".

An eye creates personality

An alien is single eyed or more than two eyed, but why? Do we want them to look horror or we think they can see more than us. We are making alien different from us.

Why we need two eyes? 

Its very obvious question for layman of biology and physics. Both of our eyes are same. Do they are interchangeable? Well lets find out some facts.
We need two eyes to see a single object. Both our eyes make a picture of our visual things. One eye enable us to see an object in 2 dimensions and the other eye build 3rd dimension.
 In simple words our one eye make a picture of the object that we see and other eye enables us to determine the distance of that object from us. We can actually see this real 3D world when we use both eyes simultaneously.

Are warriors practicing shooting targets with one eye closed from history?

If we talk about 'Arjuna', what technique he had used for archery.
To the maina, its songs,
To the peacock, its hues,
To the tiger, its claws,
To the man-concentration.

Both eyes opened and well concentrated.

Both eyes in front? What about things behind our back?

We have both our eyes in front of our face. We can't see anything behind us, Is this really necessary? or done for a purpose?
Humans, Tigers, Lions, Eagle and all attacking creatures have their both eyes in front. Rabbits, mouse, sparrow and all prey creatures have their both eyes on different sides of face.

 They can see about 360 degree of their surroundings. But we can only see half of what we have around us. Perception from both eyes simultaneously enables us to determine the distance of object from us as discussed earlier but eyes in different direction can't do so. They just see the whole thing and start running on any disturbance without bothering the distance of source. Do you think this could be the measurement of intelligence among these two categories on acting basis?