Top 10-20 Interesting Facts About The Human Eye

  1. The human eye can distinguish around 10 million different colors.
  2. The human eye blinks about 15 to 20 times per minute.
  3. The cornea is the only tissue in the human body that doesn’t have blood vessels.
  4. The human eye can detect a candle flame from up to 1.6 miles away on a clear night.
  5. The retina contains about 120 million rod cells, which allow us to see in low light conditions.
  6. The average person blinks about 28,800 times a day.
  7. The human eye has six muscles that control its movement.
  8. The lens of the eye is made up of about 65% water and 35% protein.
  9. The human eye is not sensitive to ultraviolet light, but some birds and insects can see it.
  10. The human eye is about 24mm in diameter.
  11. The iris is the colored part of the eye and is responsible for regulating the amount of light that enters the eye.
  12. The human eye can process up to 36,000 bits of information every hour.
  13. The cornea is the first part of the eye to focus light.
  14. The human eye can distinguish between 2.3 million shades of color.
  15. The retina is the part of the eye that sends signals to the brain to form visual images.
  16. The human eye can adjust to changes in light intensity within a range of 10 billion to 1.
  17. The optic nerve sends visual information from the eye to the brain.
  18. The human eye is able to see objects as small as 0.1 millimeters.
  19. The eye muscles are the most active muscles in the body, moving more than 100,000 times per day.
  20. The human eye can detect a single photon of light under certain conditions.

List facts created and sourced by