20 Interesting Facts About Human Eye You Should Know

20 Interesting Facts About Human Eye You Should Know Facts by Factober.com

Written by Factober Editor

Factober.com (Knowledge, Fun, Productivity & Apps).

September 15, 2020

Facts About Human Eye

The eye is a human body organ that reacts to light and allows vision. Because of eyes, we can not only see other objects but also can sense the depth and distance. Did you know How much does an eyeball weigh?

We actually see with your brain, not your eyes. Human eyes are work as a camera. And, based on the information and data provided by these cameras. Wow! We’ve two cameras now.

  1. The evolution of eyes began 550 million years ago. It would take 364,000 years from eyes to evolve from a patch of light-sensitive cells to the complex eyes we have today.
    Science World
  2. Brown is the most common eye color in the world. Approx. 79% of the world’s population has brown eyes, 8% to 10% of the world has blue eyes, 5% Hazel Eyes, 5% Amber Eyes, 2% green eyes. Gray, Red or Violet and Heterochromia-A Rare Case Of Two Eye Colours consists of less than a percent.
    World Atlas 
  3. Our eyes are separated horizontally images we see in the two eyes are slightly different and the difference is proportional to the relative depth. Visual image processing from the eye to the brain happens in stages.
    Scientific American
  4. We actually see with your brain, not your eyes. Human eyes are work as a camera. And, based on the information and data provided by these cameras. Wow! We’ve two cameras now.
  5. The human eye weighs about 7.5 grams.
  6. Human eyes are about 0.02% of body mass. Oh! Quite small ones.
  7. The cornea accounts for about 70 percent of the eye’s total focusing power.
    Harvard.edu 
  8. Visual impairment is the condition in which the vision is not correctable by glasses.
  9. There are six extraocular muscles. They control the movement of the eye. They are a superior, an inferior, medial, and lateral rectus, as well as a superior and an inferior oblique.
  10. The levator palpebrae superioris is a muscle that is responsible for controlling the eyelid elevation.
  11. Did you know why do you take a closer look at something? To have a clear snapshot, right? Right. Since only a small part of the eye called the fovea provides sharp vision, you have to move your eyes to follow the object.
  12. Smoking is injurious not only to your health but also, to your eyes. If you smoke, you can develop serious eye conditions that can cause vision loss or blindness.
    CDC
  13. Human eyes have blind spots. There are no photoreceptors at this place, so, there is no image detection in this area. But, our brains are so intelligent that they fill the gap on their own based on the information available from the other eyeball. Wondering where your blind spot is? In your left eye, it’s approximately 15 degrees to the left of your central vision (two hand widths, if sticking out your arm). In your right eye, it’s about 15 degrees to the right of your central vision. And, of course, having a blind spot is natural. So, no need to worry.
    Healthline
  14. The orbit is the cavity or socket of the skull in which the eye and its appendages are situated.
  15. Most of the humans have a dominant eye. A dominant eye isn’t always about one having better vision, but rather one leading better than the other because of preference. And, of course, it’s normal.
    Healthline
  16. The human eye can distinguish about 10 million different colors.
  17. The newborn babies can’t produce the tears when they cry. This ability gets developed within the first month of birth.
  18. Human eyes blink approximately 12 times per minute in adults.
  19. Did you know why your eyes experience fatigue when you try to read something for a longer time? The reason is when the eyes are focused on an object for an extended period of time, such as when reading, the rate of blinking decreases to about 3 to 4 times per minute. Because of this our eyes dry out and become fatigued when reading.
  20. Human eye blinking is useful when diagnosing other diseases like Parkinson’s disease, Tourette syndrome, strokes, or disorders of the nervous system.

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