why humans have two eyes?

Answer 1

There is a line of symmetry that runs down the middle. There is one of anything that lies on this line, and two mirror imaged if they lie away from the line. The gastro-intestinal tract is on the line, beginning at the mouth and ending at the anus, although it weaves back and forth along the way. The eyes, located off the line, are mirrored.

Answer 2

the main reason we have two eyes in the front of our heads is for depth perception. Each eye has a slightly different range of vision, and when we see with both eyes, our brain interprets the overlapping area as depth. This only happens with animals with eyes on the front of the head because for animals that have eyes on the side of their heads, their visual fields do not overlap at all. Thus, this increases their range of vision (which is important for herbivores who need to see predators hiding in the greatest area) but not for carnivores/omnivores (which include humans) becasue judging distance is very important for hunting.

Answer 3

We have two eyes because our ancestry, going back before the mammal-like reptiles, has been to be animals with two eyes.

Two eyes are necessary for "binocular vision" which gets two slightly different images of the same thing and can calculate distance from that. We need two eyes to judge distance accurately as do many animals.

Answer 4

Having two eyes is certainly better than having just one because two eyes provide us with stereo vision and depth perception -- two things that just one eye could not give us.

With 2 ½ inches separating our two eyes, each eye views an object from a slightly different angle. For instance, if you hold up a flower and look at it with just your right eye, the image is different from the image of when you look at it with just your left eye. The right eye sees more of the right side of the flower while the left eye sees more of the left side of the flower. If you placed the two different images on top of one another, they would not match and our vision would be out of focus. However, our brains sort out these varying visual messages from our two eyes, combines the images, and the recreates one three-dimensional image.

This is referred to as binocular vision. Just like your look through two lenses in binoculars, humans view the world through two lenses. The eyes of many other animals are placed differently than ours. Many birds have an eye on each side of their head. Each eye sees a completely separate area stretching out on the left or the right.

Answer 5

Besides the answer as depth perception and binocular vision,the answer will be same as why we have two hands,ears,nose and legs.These are the senses which are important and we depend on everyday for computers,listening to music etc.The reason we have two is because it is in the outer body of ours.We tend to do activities and stuffs that can injure our hands,ears,nose,legs and eyes.If we lose one of our hands etc,we will still have another one to survive life as per normal.

Answer 6

why humans have two eyes?

You ask that as if you aren't human.

You're an alien! you have come to conquer us

You have come to spy on our weakness!

Thou shalt not!

>> Btw, it's because when your mom and dad made you [egg and sperm], and the egg has been fertilized, their genotypes and alleles called for a two-eyed child. This applies to everyone.

Answer 7

I know a rhyme for animal(including human)eyes
eyes on the side, hide
eyes on the front, hunt

Answer 8

Depth Perception.

Answer 9

That gives them binocular vision so that they can judge the distance to prey or to enemies using the 3 dimensional clues from both eyes.

Answer 10

What's with the depth pf perception thing ?
I have vision defects and I only use one at a time . You mean to tell me that other people see things I don't see ?