Human Eyes Facts

Human Eyes Facts

1. The human eye cannot perceive a motionless image.

2. Humans are the only animals to produce emotional tears.

3. The human eye contains five to seven million receptors for color perception.

4. The human eye contains structures called Rods and cones. Rods register the shapes of images and respond to low levels of light and Cones responds to bright lights and registers the color of images.

5. The human eye has 110-130 million receptors to perceive light.

6. The Human eye is the only multi-focus lens in the world which can adjust in 2 milliseconds.

7. The human eyeball is 24.5 mm long.

8. Women blink nearly twice as much as men.

9. Human eyes are the fastest moving body part.

10. There are around 1,200,000 optic fibers in the human eye.

11. There are 137 million light sensitive cells in the eye’s retina and the fluid that fills the eye is changed 15 times a day.

12. When we see an image, the human eye captures the inverted image of it. It is the brains interpretation that makes us to see the upside down captured image in to a normal erect image.

13. You can see ultraviolet light, the ability is just filtered out by the eye’s lens.

14. The eyeball of a human weighs approximately 28 grams.

15. About one third of the human race has 20-20 vision.

16. When you look at an object, the image of that object appears upside down on your retina. However, your brain automatically corrects for this, allowing you to perceive the object the right side up.

17. Every hour, the human eye can process 36,000 bits of information.

18. Eyes are the only part of the human body that functions at 100 percent ability at any movement.

19. Humans are extremely visual; 90% of the information we gather from our surroundings is from our eyesight.

20. If the human eye was a digital camera it would have 576 megapixels.

21. If you blink one eye you move over 200 muscles.

22. If you could save all the times your eyes blink in one life time and use them all at once you would see blackness for 1.2 years!

23. In the middle of the day, our eyesight will be sharper.

24. It is believed that the main purpose of eyebrows is to keep sweat out of the eyes.

25. Men can read smaller print than women; women can hear better.

26. Most people blink about 25 times per minute.

27. Most people have three types of color receptors to see color vision, while some women have four or even five of these receptors and can see a wider range of colors.

28. Our eyes can distinguish up to ten million color surfaces and take in more information than the largest telescope known to man.

29. Our eyes never grow, and our nose and ears never stop growing.

30. People with blue eyes have a higher alcohol tolerance.

31. The eyes have the fastest reacting muscle in the whole body. It contracts in 1/100th of a second.

32. The Iris is the part of the eye that determines the color of the eye.

33. The lens of the human eye is composed of 65% water and 3% protein.

34. We shut our eyes for 0.3 seconds, when we blink.

35. Your eyeballs are 3 1/2 percent salt.

36. Blind people understand spoken words quicker than sighted people.