Throughout human evolution, the eyes have been vital to our survival. They have evolved to be round, so that they can rotate to distinguish delicious prey, or rise up from boredom when your cousin talks for the fourth time, about his new car.
To get to this point, our ancestors have come a long way. They are thought to have evolved from a small patch of light-sensitive soil into unicellular organisms that would help them move toward light in hopes of finding food.
As creatures evolved, this piece of land began to bend inward to better focus light. And now, a series of later evolutions, what we have achieved are two glittering spheres that are able to see about a million colors. Not bad, right?
We, too, can be part of the whole "window of the soul" idea, as our eyes can portray more of our emotions than you might think.
The baby eye expands when you are scared, nervous or excited. This may be why our eyes enlarge when we are in contact with someone we like.
Research has also shown that even having eye contact with a port painting can bring about a whole lot of brain activity.
Our eyes are also responsible for another universal emotional response - tears.
In fact, we have three types of tears, each with its own chemical composition:
1. Basal, which stain the eye.
2. Reflex tears, caused by irritants such as dust or chopped onions.
3. Psychic, or emotional tears, the kind that appear when you see the end of a painful movie.
The human eye may not be perfect. Parts of them are also useless, such as: a part in light pink on the inner corners of the eyes.
Our ones are interesting not only physically but also culturally.
The eye of Horus may symbolize the Illuminati to some, but its origin lies in Egypt, where the eye is a symbol representing sacrifice, healing, and protection.
In Turkey, some believe that a sideways glance can cause real pain. Glass pendants, also in the shape of an eye, are worn to protect against the "evil eye".
Whether your eyes are blue, black or brown, almond or circular in shape, the important thing is that they are unique. Even the two eyes of a man are unique and different from each other.
But we all have one thing in common: We can never sneeze with our eyes open.
Source: BBC
