6 Facts about eyes that I can bet you don’t know
Throughout the history, the humans came across many believable, unbelievable, mysterious things. While our ancestors have been around for about six million years, the modern form of humans only evolved about 200,000 years ago.
Six million years when compared to 0.2 million, well the question is that how can smart being like humans take so much time to evolve?
What was the starting phase when our ancestors were evolving?
According to the studies when our ancestors were evolving their eyes played a major role in evolution. We all know that the chimpanzee and bonobo, are human’s closest living relatives. These species look alike in many ways, both in body and behavior. But for a clear understanding of how closely they are related, scientists compared their DNA, an essential molecule that’s the instruction manual for building each species. Humans and chimps share a surprising 98.8 percent of their DNA.
So when you look closely you will find that our eyes are not so different from theirs. 6 million years is a big life span and yet we are surviving, many species do not survive they just extinct in thin air. The one of the main reason of human survival is eyes. The main feature of our eyes is that both eyes are just some centimeters apart. Each half of your brain receives one half of the image, and then they scramble the images together to compose the whole picture you’re used to seeing. While most of the animals do not have this quality.
Here are some facts about the eyes:
Fact 1: The eye is the second most complex organ in our body (after the brain)
It is composed of more than 2 million operational parts which can process 36,000 bits of information every hour!
Fact 2: Cornea is the only tissue in the eye that doesn’t need blood
Cornea is essential for vision and the presence of blood vessels would have interfered in this process. So, this is the only living cell in our eye that is not directly connected with blood vessels. It gets oxygen and nutrients from the tear fluid in its outer part and the inside part gets nutrition from aqueous humour (the thick watery substance between the lens and the cornea)
Fact 3: The eye muscles are the strongest in our body
The external muscles of the eye are noticeably large in relation to the small size and weight of the eyeball and when it comes to strength, they are the strongest muscle for the job they do.
Fact 4: All of us have a blind spot in our eyes
There is a place in eye which is called blind spot.
Fact 5: The eye requires no rest
The eye is the only part of the human body that can function at 100% ability at any moment, day or night, without rest. But you should give rest to the eyelids and the external muscles of your eyes for its better functioning
Fact 6: We blink 25000 times a day
Large number, isn’t it? Blinking has two purposes – to keep the eyes lubricated and to protect the eye from foreign particles.
Well respect the maker who gives us those eyes! 🙂