1. Interesting facts about Eyes !!!
Eyes are organs that detect light and convert it into electro-chemical impulses in
neurons. The simplest photoreceptors in conscious vision connect light to
movement. Here are some interesting Facts about Eyes :-
1. Healthy eyes are so sensitive to light that a candle burning in the dark can be
detected 1.6km (1 mile) away.
2. The human eye can distinguish about 10 million different colors.
3. The cornea in eye is the only living tissue in the human body that does not
contain any blood vessels.
Human Eye !!!
4. All babies are color blind when they are born.
5. Vitamin A can help to improve eyesight because it is needed by retina for
forming specific metabolite.
6. Our body has some natural protection for our eyes. Our eyelashes help to keep
dirt out of our eyes. Our eyebrows are made to keep sweat from running into our
eyes.

2. 7. Blinking helps to wash tears over our eyeballs. That keeps them clean and
moist.
8. The shark cornea has been used in eye surgery, since its cornea is similar to a
human cornea.
9. The eyeball of a human weighs approximately 28 grams.
10. Babies' eyes do not produce tears until the baby is approximately six to eight
weeks old.
11. The reason why your nose gets runny when you are crying is because the
tears from the eyes drain into the nose.
12. Human eyes contain a small blind spot where the optic nerve passes through
the retina. Our brains use information from the other eye to fill in the vision gap
so it is rarely, if ever, noticed.
13. Eyes are composed of more than two million working parts.
Evolution of Human Eye !!!
14. Our eyes are always the same size from birth, but our nose and ears never
stop growing.
15. Scientists believe that animal eyes evolved around 500 million years ago,
beginning in simple form but giving a distinct advantage. This advantage led to
eyes evolving quickly amongst animals as those without the ability to see
struggled to survive against those that could.

3. 16. Human eyes can process 36,000 bits of information every hour.
17. Only 1/6th of human eyeball is exposed to the outside world
18. Red and Green are the most commonly confused colours among colour
blind people.
19. Colour blindness is 10 times more common in males than females
S
Structure of Eye !!!
20. The eye is the only part of the human body that can function at 100%
ability at any moment, day or night, without rest.
21. Human eyelids and the external muscles of your eyes need rest, the
lubrication of your eyes requires replenishment, but your eyes themselves
never need rest.
22. It is impossible to sneeze with eyes open.
23. Human retina contains 120 million rods for “night vision”, and 8 million
cones that are colour sensitive and work best under daylight conditions.
24. About half of the brain is involved in the seeing process. Humans are
very much visual animals.
25. Human Eyes contribute towards 85% of total knowledge.