Your eye is one of the most intresting and still mysterious part of the body. Almost every human on the planet depends on them everyday, but how much do you really know about your eyes, and how they work?
Here are 50 intresting facts that you may not know about your eyes.
1. The most common eye colour in the world is brown.
2. Your eye is the quickest muscle in your body – which is why when something happens quickly, we say ‘in the blink of an eye!' Which is actually one tenth of a second.
3. You see with your brain, not your eyes. Our eyes function like a camera, capturing light and sending data back to the brain.
4. You have two eyeballs in order to give you depth perception – comparing two images allows you to determine how far away an object is from you.
5. Eye colour is determined by the amount of melanin in your iris.
6. 20/20 vision simply means that you have normal vision.
7. Your eyes become tired when you read or stare at a computer for long, this is because you blink less often.
8. Although our nose and ears keep growing throughout our lives, our eyes remain the same size from birth.
9. You blink more when you talk.
10. People generally read 25% slower on screen than on paper.
11. All babies are born colour blind.
12. It’s impossible to sneeze with your eyes open.
13. Your eye can see 500 shades of grey.
14. You blink on average 4,200,000 times a year.
15. Your cornea is the only tissue in your body which doesn’t contain blood vessels.
16. Your eye can function at 100% at any given moment, without needing to rest.
17. Smoking reduces your night vision.
18. Your eyelashes have an average lifespan of five months.
19. A newborn baby will cry, but not produce any tears. Babies do not produce tears until they are around six weeks old.
20. Your eyes are made up of over 200 million working parts.
21. In the right conditions and lighting, you can see the light of a candle from 14 miles away.
22. The shark cornea is used in human eye surgery as it is the most similar to a human's cornea.
23. Your eye only sees three colours, red, blue and green. All other colours are combination of these colours.
24. Your eye muscles are the most active muscles in the human body.
25. It’s possible for you to blink five times in a single second.
26. Your eyes has around 107 million light sensitive cells.
27. Your eyes has 7 million cones which help you see colour and detail, as well as 100 million cells called rods which help you to see better in the dark.
28. A blink typically lasts 100-150 milliseconds.
29. A blue-eyed person share a common ancestor with every other blue-eyed person in the world.
30. Your eyes close reflexly to protect you from perceived dangers.
31. Your eyelashes keep dirt out of your eyes.
32. Your eyebrows prevent sweat dripping into your eyes.
33. Heterochromia refers to a condition where your eyes are two different colours.
34. Your eyes are positioned in a hollowed socket to protect it.
35. Eyes are the second most complex organ after the brain.
36. You have unseen, and harmless, microscopic creatures living in your eyelashes.
37. The muscles in your eye are 100 times stronger than they need to be to perform their function.
38. When your eyes are watering it may be a sign of dry-eye, and your eyes are producing more moisture to compensate.
39. Your eyes start to develop just two weeks after conception.
40. The older you get, the less tears you produce.
41. Your eyes are able to process 36,000 pieces of information in a single hour.
42. Colour blindness is more common in males.
43. Reading in dim lighting does not damage your eyes but it may tire them out.
44. Oily fish, vitamin A and vitamin C all help you to preserve good eyesight.
45. When working at a computer, you should follow the 20-20-20 rule – look at something twenty feet away from your computer every twenty minutes for twenty seconds. It keeps your eyes healthy.
46. Eye transplants are currently impossible due to the sensitivity of the optic nerve.
47. 0nly one sixth of the your eyeball is exposed. That shows how huge it is.
48. If you lined up all the eyelashes shed during one human life, they would measure 98 feet long.
49. You see things upside down - it is your brain which turns the image the right way up.
50. The space between your eyebrows is called the Glabella.
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