Eyes provide us with one of our five senses, sight. Arguably one of most important senses, without which we would literally be lost!
However we often take our eyes for granted and don’t appreciate them for what they are – complex structures which collect light and turns it into electrical impulses detected by our brains! If you want to know even more amazing facts about eyes, read on..!
1. There are about 39 million people that are blind around the world.
2. Humans and dogs are the only species known to seek visual cues from another individual's eyes, and dogs only do this when interacting with humans.
3. Only 1/6 of the human eyeball is exposed.
4. Eyes contain around 107 million light-sensitive cells.
6. Around the world, about 39 million people are blind and roughly 6 times that many have some kind of vision impairment.
7. The average blink lasts for about 1/10th of a second.
8. The world's most common eye colour is brown.
9. The first blue-eyed person is said to have lived 6,000-10,000 years ago.
11. The human eye can differentiate approximately 10 million different colors.
12. The only part of the body that has no blood supply is the cornea of the eye. It receives oxygen directly from the air.
13. People with blue eyes are more sensitive to pain than others.
14. You blink your eyes over 10,000,000 a year.
16. The farthest you can see with the naked eye is 2. 4 million light years away! (140,000,000,000,000,000,000 miles.) that's the distance to the giant andromeda galaxy. You can see it easily as a dim, large gray "cloud" almost directly overhead in a clear night sky.
17. Our eyes are always the same size from birth, but our nose and ears never stop growing.
18. Each of your eyes has a blind spot - where the optic nerve attaches to the retina. The brain is just smart enough to fool you into ignoring it.
19. Just behind our pupil is the lens - which is round, flat and thicker toward the middle.
21. The only cells that survive from the time you are born until death are in your eyes.
22. In the right conditions and lighting, humans can see the light of a candle from 14 miles away.
23. In a very basic form, eyes are thought to have first developed in animals around 550 million years ago!
24. When you read or stare at a computer, you blink less often resulting in tired eyes.
26. The eye muscles are the most active muscles in the human body.
27. Our eyes are made up of over 2 million working parts.
28. The eyeball weighs around 28 grams.
29. Albinism affects melanin production; perhaps resulting in extra sensitivity to light and a red-eyed appearance.
31. When your eyes are watering it may be a sign of dry-eye, and your eyes are producing more moisture to compensate.
32. The average person blinks 12 times a minute (bet you just blinked!).
33. Ommatophobia is a fear of the eyes.