40 facts you didn't know about eyes

We are used to stressing our eyes mercilessly while sitting in front of monitors. And few people think that in fact this is a unique organ, about which not everything is known even to science.

Brown eyes are actually blue underneath the brown pigment. There is even a laser procedure that can turn brown eyes blue forever.

The pupils of the eyes dilate by 45% when we look at the one we love.

The cornea of ​​the human eye is so similar to the cornea of ​​a shark that the latter is used as a substitute for eye surgeries.

You cannot sneeze with your eyes open.

Our eyes can distinguish about 500 shades of gray.

Each eye contains 107 million cells, and they are all sensitive to light.

Every 12th male is color blind.

The human eye is able to perceive only three parts of the spectrum: red, blue and green. The rest of the colors are a combination of these colors.

Our eyes are about 2.5 cm in diameter and weigh about 8 grams.

Of all the muscles in our body, the muscles that control the eyes are the most active.

Your eyes will always remain the same size as at birth, and your ears and nose will not stop growing.

Only 1/6 of the eyeball is visible.

On average, over a lifetime, we see about 24 million different images.

Your fingerprints have 40 unique characteristics, while your iris has 256. It is for this reason that retinal scans are used for security purposes.

People say "you can't blink an eye" because it is the fastest muscle in the body. Blinking lasts about 100 - 150 milliseconds, and you can blink 5 times per second.

The eyes transmit a huge amount of information to the brain every hour. The bandwidth of this channel is comparable to that of Internet providers in a large city.

Our eyes focus on about 50 things per second.

The images that are sent to our brain are actually inverted.

Eyes work the brain more than any other part of the body.

Each eyelash lasts about 5 months.

The Maya found squint attractive and tried to make their children squint.

About 10, 000 years ago, all people had brown eyes, until a person living in the Black Sea region developed a genetic mutation that led to blue eyes.

If you only have one red eye in a flash photo, chances are that you have eye swelling (in case both eyes are looking in the same direction at the camera). Fortunately, the cure rate is 95%.

Schizophrenia can be determined with an accuracy of 98.3% using a routine eye movement test.

Humans and dogs are the only ones looking for visual cues in the eyes of others, and dogs only do this by interacting with humans.

About 2% of women have a rare genetic mutation that causes them to have an extra retinal cone. This allows them to see 100 million colors.

Johnny Depp is blind in his left eye and myopia in his right.

There is a case of Siamese twins from Canada who have a common thalamus. Thanks to this, they could hear each other's thoughts and see each other's eyes.

The human eye can make smooth (non-intermittent) movements only if it is following a moving object.

The history of the Cyclops originated from the peoples of the Mediterranean islands, who discovered the remains of extinct dwarf elephants. The skull of elephants was twice the size of a human skull, and the central nasal cavity was often mistaken for the orbit.

Astronauts cannot cry in space because of gravity. Tears collect in small balls and begin to pinch the eyes.

The pirates used a blindfold to quickly adapt their vision to the environment above and below deck. Thus, one eye became accustomed to bright light, and the other to dim light.

There are colors that are too “difficult” for the human eye, they are called “impossible colors”.

We see certain colors, since this is the only spectrum of light that passes through the water - the area where our eyes appeared. There was no evolutionary reason on earth to see a broader spectrum.

Eyes began to evolve around 550 million years ago. The simplest eye was the particles of photoreceptor proteins in unicellular animals.

Sometimes people with aphakia, the absence of a lens, report seeing the ultraviolet spectrum of light.

Bees have hairs in their eyes. They help determine wind direction and flight speed.

Apollo astronauts reported seeing flashes and streaks of light when they closed their eyes. It was later revealed that this was caused by cosmic radiation irradiating their retinas outside the Earth's magnetosphere.

We “see” with our brain, not with our eyes. Blurry and poor quality image is a disease of the eyes, as a sensor receiving an image with distortion. Then the brain will impose its distortions and "dead zones".

About 65-85% of white cats with blue eyes are deaf.