Interesting facts about eyes

A person receives about 90% of information from the outside world through the eye.

For 99 percent of people, the need for glasses first occurs between the ages of 43 and 50.

We blink about 15, 000 times a day. Blinking is an extremely important function of our eyes, as it helps to remove any debris from the surface of the eye, disinfect and cover the eye with a fresh tear.

The normal eye shape for most people is an ellipsoid. However, in 40% of adults, the shape of the eye is closer to a ball with a diameter of about 24 mm, in a newborn - about 18 mm. The mass of the eyeball of an adult is about 8 g, in a newborn - about 3 g.

The diameter of the eyeball hardly changes with age. This is why children's eyes seem so big.

Gecko lizards have no eyelids, so they are forced to periodically wet a special transparent membrane in front of their eyes with their tongue.

Instead of a pair of eyes, a relative of the starfish, the snaketail, has a multitude of microscopic lenses that cover individual parts of their outer skeleton. And ofigura can have up to 100, 000 such "eyes".

On Earth, approximately 1% of people have different colors of the left and right eyes.

Only 2% of the world's population has green eyes, thanks to the Holy Inquisition.

The eye is rotated by 6 eye muscles. They provide mobility of the eye in all directions.

Like fingerprints, irises are uniquely shaped. With the help of new technologies, it was decided to use this during passport control at checkpoints.

Since 2002, eyeball piercings have been available in the Netherlands. With the help of a special procedure, a precious decoration in the form of a symbol, for example, a heart or a star, is implanted into it.

All newborns have gray-blue eyes, as there is no pigment in the iris stroma. The color of the iris changes and forms by the first year of a child's life.

Goats, sheep, mongooses and octopuses have rectangular pupils.

The dragonfly's eye consists of 30, 000 individual eyes and perceives up to 300 images per second.

A congenital defect in color vision - color blindness - is named after the English chemist John Dalton (1766–1844), who did not see the color red and studied the symptoms of his disease. To one degree or another, about 8% of men and only 1% of women suffer from color blindness.

Most vegetarian animals have eyes on either side of the head, while predators have eyes on the front.

Only a person has protein around the pupils. It is absent in other living things, even in chimpanzees. Without protein, it is difficult to determine the direction of the gaze.

While sneezing, a person, even for a split second, closes his eyes.

If you shoot on film everything that a person sees in just one day, then it would take over 19 kilometers of film.

One of the signs of beauty the Maya people considered squint. To deliberately develop it, a rubber ball was tied to the child at eye level.

Thanks to the huge number of light-sensitive cells - more than 130 million - the human eye is able to perceive about 5 million color shades.

The falcon is able to see a target 10 cm in size, from a height of 1.5 km.

There is a version that pirates and other sailors put on a blindfold so that in the dark, removing the blindfold, they could see well with their second eye adapted to darkness.

Despite the lack of vision in one eye, Admiral Nelson did not wear an eye patch. This is how the artists portrayed him to give significance to the figure of the commander.

Red eye color is found only in albinos. It is associated with the complete absence of melanin in the iris, therefore it is determined by blood in the vessels of the iris.

Frogs only see moving objects. To consider a stationary object, she herself needs to start moving.

Whales have an eye weighing up to 1 kg, but at the same time they see poorly even at a distance of one meter.

Crocodiles, eating meat, cry. Thus, through special glands near the eyes, they remove excess salts from the body. This is where the expression "crocodile tears" came from.

Eyes never freeze. This is because they do not have cold-sensitive nerve endings.

Bulls do not distinguish red color and in bullfighting it is not the red spanking that makes them nervous, but its flashing in front of the muzzle.