Did you know that the eyes themselves are not that which actually allow you to see? It is the brain which does all the seeing by interpreting images sent from the eyes in the form of nerve signals through the optic nerve. The eyes are simply a conveyance for messages sent to the brain, in the form of an inverted image via the optic nerve.
Similarly, did you know that only one-sixth of your eye is even visible to the outside world (the rest is hidden behind the front part of your eye and housed in the eye cavity in your skull? Or that your eyes are comprised of more than two million intricately connected working parts, which need to work in unison in order for you to be able to ‘see’?
And that’s just the beginning! Here are 15 fascinating facts about your eyes, one of the most precious gifts of God to mankind:
- Your eyes focus on 50 different objects every second, as you move your eyes around and in depth of field from the nearest to the farthest.
- The only organ more complex than the eye is the brain, the brain being a really complex part and only 10% is understood about it.
- Your eyes can distinguish approximately 10 million different colours or shades of colours (the basic colors are just 3, red, blue and green).
- It is impossible to sneeze with your eyes open.
- Ommetaphobia is a fear of the eyes.
- 80 percent of all learning about the outside world comes through the eyes, one of our five senses.
- Your eyes can detect a candle flame 1.7 miles away.
- Your iris (the colored part of your eye) has 256 unique characteristics; your fingerprint has just 40, thus prompting electronic IDs such as an iris scan or an eye scan.
- Heterochromia is the medical term for having two different coloured eyes.
- Only 1/6 of your eyeball is visible.
- Your posterior part of your eye, the retina in the eyes are comprised of cells called rods and cones. Rods allow you to see shapes, while cones are responsible for detecting and deciphering colors (10 million of them as enumerated above).
- The average person blinks 12 times a minute (bet you just blinked!), which is a way to keep the eyes lubricated and healthy.
- The most dangerous sea fish: the shark’s cornea is nearly similar to the human cornea, and has even been used in surgery of the human eyes!
- Your eye is the fastest contracting muscle in the body, with very fast reflexes and contracts in less than 1/100th of a second or 10 milliseconds.
- The optic nerve, which is the bunch of nerves which connect the eyes to the brain, contains more than one million nerve cells.