Everyone has heard that the eyes are the mirror of the soul. But facts about eyes like weighs about 8 grams, that the brown eyes are actually blue with brown pigment, they are known only to ophthalmologists and participants in intellectual quizzes. We tell you even more surprising.
Incredible facts about eyes and eyesight
Man sees the world better than many animals
Biologists from Duke University in the USA conducted an experiment and evaluated Details that look sharp to people may be blurry to their pets vision of approximately 600 species of insects, birds, mammals, fish and other animals. this is amazing facts about eyes.
The study showed that people’s eyesight is sharper than that of dogs and cats (they see everything in unsaturated colors), rats (they see everything blurry and in blue-green shades) and even flies (the world for them is a giant slow-motion mosaic).
A person is much better at distinguishing small details.
Eye color depends on the amount of melanin
Another facts about eyes is that, The iris is responsible for the color of our eyes.
It has special cells (chromatophores) containing the pigment melanin, which is visible through the cornea.
Its quantity determines the color: if there is a lot of melanin, the eyes will be black or brown, if not enough, green or blue.
Among people and animals, red eyes are also found, it happens in albinos. They have completely no melanin.
so the color of the eyes is determined by the blood in the vessels of the iris.
Each person’s Iris is unique
Some people may have similar eye color, but the pattern on the iris is never repeated, like fingerprints.
Previously, this feature of the iris made it convenient for bio metric identification. But in the last decade, an even more reliable method was invented.
The cornea is even more unique
Although the iris has established itself as a unique part of the human eye, authentication on it is not completely reliable. The fact is that, like the skin at your fingertips, the color of the iris can be changed with surgery.
For example, the American physician Greg Homer developed Laser procedure can turn brown eyes blue method of turning brown eyes into blue using laser surgery.
At the same time, Dr. Celia Sanchez-Ramos of the Complutense University of Madrid won the grand prize of the Invention Exhibition in Geneva,in his report that the cornea is the most reliable part of the human body to establish his personality.
Contact lenses were invented much earlier than you think.
The first soft contact lenses released in 1971. Now lenses are made from high-tech materials: for example, silicone hydro-gel or hyper-gel. Due to this, they retain moisture well and pass oxygen.
A prototype of modern contact lenses was discovered even among the sketches of Leonardo da Vinci. The scientist experimentally found that the optical system of the eye can be improved by contacting the cornea with water.
He placed the face of a poorly seeing person in a basin of water, and this person was the first to be able to see clearly.
Some more Surprising & interesting facts about the eyes
- Every 12th male is color blind.
- Women blink about twice as often as men.
- In the Netherlands, you can have an eyeball pierced. A procedure is being carried out to implant a precious piece of jewelry, such as a tiny heart or asterisk.
- It is impossible to sneeze with open eyes.
- Your eyes focus on 50 different objects every second.
- The only organ more complex than the eye is the brain.
- Your eyes can distinguish approximately 10 million different colors.
- It is impossible to sneeze with your eyes open.
- Ommatophobia is a fear of the eyes.
- 80 percent of all learning comes through the eyes.
- 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.
- Heterochromia is the medical term for having two different colored eyes.
- Only 1/6 of your eyeball is visible.
- Your eyes are comprised of rods and cones. Rods allow you to see shapes, while cones are responsible for detecting and deciphering colors.
- The average person blinks 12 times a minute (bet you just blinked!).
- The shark cornea is nearly identical to the human cornea, and has even been used in human eye surgery!
- Your eye is the fastest contracting muscle in the body, contracting in less than 1/100th of a second.
- The optic nerve contains more than one million nerve cells
The easiest visual acuity test
Look at the sky at night, find the Big Dipper. If you clearly see a small star in the bucket handle near the middle star, then you have normal visual acuity. This method of verification was used by the ancient Arabs.
So, There are more and more facts You wish to know , I shared some of them. If you wish to share more then comments us.
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