It is with the help of vision that a person perceives most of the information from the world around him, therefore all the facts associated with the eyes are interesting to the person. To date, there are a huge number of them.
Eye structure
Interesting facts about the eyes begin with the fact that man is the only creature on the planet that has white eyes. Otherwise, the
inner space of the eye is filled with cones and rods, as in some animals. These cells are in the eye in the amount of hundreds of millions and are photosensitive. Cones respond to changing light and colors more than sticks.
In all adults, the size of the eyeball is almost identical and is 24 mm in diameter, while a newborn child has an apple diameter of 18 mm and weight is almost three times less.
It is interesting that sometimes a person can see various floating opacities in front of his eyes, which are actually strands 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, providing clarity of vision, constantly focuses on the environment at a speed of 50 objects per second. The eye moves with just 6 eye muscles, which are the most active in the whole body.
Interesting facts about the eyes include information that sneezing with your eyes open is impossible. Scientists explain this with two hypotheses - reflex contraction of the muscles of the face and protection of the eye from germs from the nasal mucosa.
Brain vision
Interesting facts about vision and eyes often have evidence 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 in an inverted form. 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 the iris of each person has 256 distinctive characteristics, while fingerprints differ only in forty. The probability of finding a person with the same iris is almost zero.
Color Impaired
Most often, this pathology manifests itself as color blindness. It is interesting that at birth all children are color blind, but with age, the perception of colors in most people returns to normal. Most often, men who are unable to see certain colors suffer from this disorder.
Normally, a person should share seven primary colors and up to 100 thousand of their shades. Unlike men, 2% of women suffer from a genetic mutation, which, 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 iridodiagnosis. It is an unconventional method for diagnosing diseases of the whole organism by examining the iris of
the eye.Blackout eyes
Interestingly, the pirates did not wear blindfolds in order to hide their injuries. They covered one eye so that it could quickly adapt to poor lighting in the holds of the ship. Alternately using one eye for rooms with dim lighting and decks with bright lights, the pirates could fight more effectively.
The first darkened glasses for both eyes appeared not to protect from bright light, but to hide the gaze from strangers. At first, they were used only by Chinese judges, so as not to demonstrate to others the personal emotions of the cases under consideration.
Blue or brown?
The color of the human eye 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:
By medical terms, they are defined as mesoderm and ectoderm, respectively. It is in the front layer that the coloring pigment is distributed, determining the color of the human eye. Interesting facts about the eyes confirm that the color of the iris is provided only by melanin, regardless of the color of the eye. The hue changes only due to a change in the concentration of the coloring matter.
At birth in almost all children, this pigment is completely absent, so the eyes of newborns are blue. With age, they change their color, which is fully established only by 12 years.
Interesting facts about the human eye also claim that color may vary depending on some circumstances. Scientists have now established a phenomenon like a chameleon. It represents a change in eye color with prolonged exposure to cold or with prolonged 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 evidence that, in fact, all people in the world are blue-eyed. A high concentration of pigment in the iris ensures the absorption of 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 geographic area. So in the northern regions the population with blue eyes prevails. Closer to 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.
Interesting 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, vision is normalized. Interesting facts about the eyes and eyesight of a person also confirm that the eye is fully formed in physiological parameters by the age of seven.
Vision can affect the general condition of the body, so with excessive loads on the eyes there is a general overwork, headaches, fatigue and stress.
Interestingly, the relationship between the quality of vision and carotene vitamin Carrot is not scientifically proven. In fact, this myth dates back to the time of the war, when the British decided to hide the invention of the aircraft radar. They explained the rapid detection of enemy aircraft by the sharp eyesight of their pilots who ate carrots.
To independently check visual acuity, you should look at the night sky. If near the middle star the handles of the big bucket (Ursa Major) manage to make out a small star, then everything is normal.
Different eyes
Most often, such a violation is genetic and does not affect general health. Different eye color is called heterochromia and may be complete or partial. In the first case, each eye is colored 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 health in general. The wearing of tight clothing is also negatively affected, since it complicates the circulation of all organs, including the eyes.
Interesting about tears
Interesting facts about the structure and work of the eye confirm that the child is not able to cry in the first month of life. More precisely, the tears do not stand out at all.
The tear composition has three components:
If the proportions of these substances on the surface of the eye are not respected, dryness appears and the person begins to cry. With an abundant course, 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 to a greater degree 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 reset for concentration. It is at the time of closure of the eyelids that the activity of the attention neural network falls, and therefore 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, with quick reading, the eyes get tired much less. Moreover, reading paper books is always a quarter faster than electronic media.
Erroneous opinions
Many people believe that smoking does not affect the health of the eyes, but in fact tobacco smoke leads to blockage of the vessels of the retina and leads 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, blindness. Also, when smoking becomes harmful lycopene.
In normal cases, this substance has a beneficial effect on the body, improving vision, slowing the development of cataracts, age-related changes and protecting the eye from ultraviolet radiation.
Interesting facts about the eyes disprove the notion that monitor radiation adversely affects vision. In fact, over-exertion brings harm to the eyes, with frequent focusing on small details.
Also, many are convinced of the need to carry out childbirth only by a cesarean route 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 rupture or detachment of the retina during childbirth. This procedure is carried out even at the 30th week of gestation and takes only a few minutes, without at all having a negative effect on the health of both the mother and the child. But be that as it may, try to visit a specialist regularly and check your eyesight.