Some Facts about human eye

your eye is are incredibly complex. They work hard from the minute you wake up to the minute you go back to sleep, constantly taking in information about the world around you. We've put together some facts about your eyes that will help you realist just how remarkable they truly are:

1.The humane eye works just like a camera.

In the same way that a camera lens focuses light into a photosensitive surface. your eyes focus onto the retina.

2. Eyes first evolved aroud 500 million years ago.

Scientists estimate that eye first evolved 500 million years ago, originally in a very simple from that could probably only distinguish light from dark.

3.The most common eye colour in the world is brown.

With over 55% of the world's population having brown eyes. it remains the most common colour. Eye colour is determind by genetics, because they dicate how much melanin in produced in your iris.

4. Some people are born with mismatched eye colours.

This condition is known as heterochromia, and is usually the result of a relative lack or exess of pigment in one eye. It is most often inherited, but may also occur due to disease or injury.

5. The cornea is the transparent covering of the iris and pupil.

It protects your eyes from dirt and germs, as well as some of the sun's UV rays, If your cornea becomes damaged you will experince distorted vision, because the light that enters your eye is interfered with.

6. 20\20\ vision just mean you have normsal eyesight.

Contrary to popular belief, having 20\20 vision isn't anything remarkable. Rather, it means that you can read a chart from 20 feet way in normal lighting conditions.

7.Wider pupils can suggest excitement.

any positive thought can serve to dilate your pupils. For example, when you look at someone you are attracted to, they will expand up to 45% However, dilation pupils can also mean you are scared.

8. It's a myth that liars make less eye contact.

In fact, a well practised liar will try to overcompensate as an attempt to "prove" they are telling the truth, by making too much eye contact and holding a gaze.

9. A woman's eyesight can be affected by pregnancy.

While hormones are raging and physical changes are occurring, it is possible for a woman to experience problems with her sight. These are usually minor and temporary conditions such as blurred vision and dry eyes, and will go away once the child is born.

10. Your eyes become tired when you read or stare at a computer for extended periods of time.

This is because you blink less often and you are not relaxing the muscle inside your eye. If this happens to you often, you should make sure that you have an up-to-date prescription.

11.Human corneas are similar to a sharks' cornea.

This similarity means that sharks' eyes can be used as replacements in human eye surgeries.

12. The "floaters" in your vision are permanent.

The are mainly made up of protein strands floating inside the eye's vitreous, casting shadows on the retina. Because the vitreous is completely stagnant, they will remain there indefinitely unless surgically removed.