It is with the help of vision that a person perceives most of the information from the surrounding world, therefore all facts related to the eyes are of interest to a person. Today there are a huge number of them.
The structure of the eye
Interesting facts about the eyes begin with the fact that man is the only creature on the planet that has the whites of the eyes. Otherwise, the inner space of the eye is filled with cones and rods, as in some animals. These cells are found in the eye in the hundreds of millions and are light-sensitive. Cones respond to changes in light and colors more than rods.
All adults have an almost identical eyeball size of 24 mm in diameter, while a newborn child has an apple diameter of 18 mm and weighs almost three times less.
Interestingly, sometimes a person can see various floating opacities before their eyes, which are actually filaments of protein.
The cornea of the eye covers its entire visible surface and is the only part of the human body that is not supplied with oxygen from the blood.
The lens of the eye, which provides clarity of vision, constantly focuses onenvironment at a rate of 50 objects per second. The eye moves with the help of only 6 eye muscles, which are the most active in the whole body.
Interesting eye facts include the fact that you can't sneeze with your eyes open. Scientists explain this by two hypotheses - reflex contraction of facial muscles and protection of the eye from microbes from the nasal mucosa.
Brain vision
Interesting facts about vision and eyes often have data that a person actually sees with the brain, not with the eye. This statement was scientifically established back in 1897, confirming that the human eye perceives the surrounding information upside down. Passing through the optic nerve to the center of the nervous system, the picture turns over to its usual position in the cerebral cortex.
Features of the iris
They include the fact that each person's iris has 256 distinctive characteristics, while fingerprints differ by only forty. The probability of finding a person with the same iris is almost zero.
Violation of color vision
Most often this pathology manifests itself as color blindness. Interestingly, at birth, all children are color blind, but with age, the perception of colors in the majority returns to normal. Most often, this disorder affects men who are unable to see certain colors.
Normally, a person must separate the seven primary colors and up to 100 thousand of their shades. Unlikemen 2% of women suffer from a genetic mutation that, on the contrary, expands the spectrum of their perception of colors to hundreds of millions of shades.
Alternative medicine
Given the structure of the eye, interesting facts about it gave rise to iridology. It is an unconventional method for diagnosing diseases of the whole body by examining the iris of the eye.
Darkening the eye
Interestingly, pirates didn't wear blindfolds to hide their injuries. They covered one eye so that it could quickly adapt to the poor lighting in the ship's holds. By alternately using one eye for dimly lit rooms and brightly lit decks, the pirates could fight more effectively.
The first tinted glasses for both eyes appeared not to protect from bright light, but to hide the view from strangers. At first, they were used only by Chinese judges, so as not to demonstrate personal emotions to others about the cases under consideration.
Blue or brown?
The color of a person's eyes is determined by the amount of concentration in the body of the pigment melanin.
The iris is located between the cornea and the lens of the eye and consists of two layers:
- front;
- rear.
In medical terms they are defined as mesodermal and ectodermal, respectively. It is in the front layer that the coloring pigment is distributed, determining the color of a person's eyes. Interesting facts about the eyes confirm that the color of the irisprovides only melanin, no matter what color the eyes are. Hue changes only by changing the concentration of the coloring matter.
At birth, this pigment is completely absent in almost all children, so the eyes of newborns are blue. With age, they change their color, which is fully established only by the age of 12.
Interesting facts about human eyes also claim that the color can change depending on some circumstances. Scientists have now established such a phenomenon as a chameleon. It is a change in the color of the eye during prolonged exposure to cold or prolonged exposure to bright light. Some people claim that the color of their eyes depends not only on the weather, but also on their personal mood.
The most interesting facts about the structure of the human eye contain data that in fact all people in the world are blue-eyed. The high concentration of pigment in the iris absorbs light rays of high and low frequencies, due to which their reflection leads to the appearance of brown or black eyes.
Eye color largely depends on the geographical area. So in the northern regions, the population with blue eyes predominates. Toward the south, there are a large number of brown-eyed, and at the equator, almost the entire population has a black color of the iris.
I wonder about vision
More than half a century ago, scientists established an interesting fact - at birth we are all farsighted. Only by the age of six months, visionnormalizes. Interesting facts about the eyes and human vision also confirm that the eye is fully formed in terms of physiological parameters by the age of seven.
Vision can also affect the general condition of the body, so with excessive stress on the eyes, general overwork, headaches, fatigue and stress are observed.
Interestingly, the connection between the quality of vision and the carrot vitamin carotene has not been scientifically proven. In fact, this myth originated during the war, when the British decided to hide the invention of aviation radar. They attributed the quick sighting of enemy aircraft to the sharp eyesight of their pilots, who ate carrots.
To check your visual acuity yourself, you should look at the night sky. If you can see a small star near the middle star of the handle of the big bucket (Ursa Major), then everything is normal.
Different eyes
Most often, such a violation is genetic and does not affect overall he alth. A different eye color is called heterochromia and can be complete or partial. In the first case, each eye is painted with its own color, and in the second, one iris is divided into two parts with different colors.
Negative factors
Most of all, cosmetics affect the quality of vision and eye he alth in general. Wearing tight clothing also has a negative effect, as it impedes the blood circulation of all organs, including the eyes.
I wonder about tears
Interesting facts about the structure and function of the eyeconfirm that the child is not able to cry in the first month of life. More precisely, at the same time, tears do not stand out at all.
The composition of a tear has three components:
- water;
- mucus;
- fat.
If the proportions of these substances on the surface of the eye are not observed, dryness appears and the person begins to cry. With abundant flow, tears can directly enter the nasopharynx.
Statistical studies claim that every year every man cries an average of 7 times, and a woman 47.
About blinking
Interestingly, on average, a person blinks once every 6 seconds, more reflexively. This process provides the eye with sufficient hydration and timely cleansing of impurities. According to statistics, women blink twice as often as men.
Japanese researchers have found that the blinking process also acts as a reboot for concentration. It is at the moment of closing the eyelids that the activity of the neural network of attention decreases, which is why blinking is most often observed after the completion of a certain action.
Reading
Interesting facts about the eyes did not miss such a process as reading. According to scientists, when reading quickly, the eyes get tired much less. At the same time, reading paper books is always a quarter faster than electronic media.
Misconceptions
Many believe that smoking does not affect eye he alth in any way, but in fact, tobacco smoke leads to blockage of retinal blood vessels andleads to the development of many diseases of the optic nerve. Smoking, both active and passive, can lead to clouding of the lens, chronic conjunctivitis, yellow spots of the retina, and blindness. Also, when smoking, lycopene becomes harmful.
In normal cases, this substance has a beneficial effect on the body, improving vision, slowing down the development of cataracts, age-related changes and protecting the eye from ultraviolet radiation.
Interesting facts about the eyes refute the view that monitor radiation adversely affects vision. In fact, too much stress from focusing on small details often harms the eyes.
Also, many are sure of the need to give birth only by cesarean if a woman has poor eyesight. In some cases, this is true, but with myopia, you can take a course of laser coagulation and prevent the risk of tearing or detaching the retina during childbirth. This procedure is carried out even at the 30th week of gestation and takes only a few minutes, without any negative impact on the he alth of both the mother and the child. But be that as it may, try to visit a specialist regularly and check your vision.
