Usefull


Color blindness: what color problems?

Color blindness: what color problems?

Color blindness is a congenital or acquired violation of the perception of colors. According to statistics, 10% of the world's population has this peculiarity of sight. The name of the phenomenon comes from the name of John Dalton, an English chemist and natural scientist, who learne...

Do you feel a foreign body in the eye, but nothing?

Do you feel a foreign body in the eye, but nothing?

The eye is a very important and extremely fragile organ. Serious burdens associated with the daily use of various techniques, the polluted atmosphere of cities, the unexplained diseases often manifest themselves in the form of unpleasant sensations, discomfort and itching. If it seems t...

What you need to do to protect your eyes from disease and keep your eyesight?

What you need to do to protect your eyes from disease and keep your eyesight?

Human eyes are constantly exposed to stress and negative external influences of Especially in modern urban environments, where people spend most of their time in sedentary work, interacting with large amounts of visual information. This contributes to a more severe and rapid manifestation ...

Quickly falls eyesight? We analyze the causes and methods of fighting for the health of the eyes

Quickly falls eyesight? We analyze the causes and methods of fighting for the health of the eyes

Do you notice more and more that the whole world seems to have turned into a vague haze? Have we stopped distinguishing the numbers of cars passing by? Straighten your eyes while reading and working on the computer, but not all that recently was it? It is possible to diagnose a sh...

Do you always need to wear glasses and with what vision do not take in the army?

Do you always need to wear glasses and with what vision do not take in the army?

Glasses - this is one of the most accessible and tested optical instruments for vision correction. Combining the achievements of medical science and the introduction of advanced industrial methods has generated a huge variety of glasses, in which you can choose an accessory that matches...

Points for working with computer: types, selection rules

Points for working with computer: types, selection rules

Technical progress, like other benefits of civilization - a stick with two ends. On one - good, on the other - harm. If you regularly work at a computer or you need to often sit behind a monitor, you will need glasses to work for a PC. These glasses can be worn by everyone, even those...

All about the accommodation of the eye

All about the accommodation of the eye

Almost every one of us at least once noticed that after a long reading, a long work at the computer or needlework, pain and burning in the eyes, temporarily deteriorating eyesight, the image becomes vague. It is known that the intense tension of the eye muscles leads to their immobility...

What is the norm and what is the refraction of the eye?

What is the norm and what is the refraction of the eye?

The human eye is a complex natural lens. To this lens all characteristics that determine the properties of other optical systems are applicable. One such characteristic is refraction, on which the visual acuity and distinctness of the image obtained in the eyes depends. In other word...

How to avoid redness in the child's eyes?

How to avoid redness in the child's eyes?

Does the child have red eyes? Do not expect that everything will pass by itself. Sometimes the cause of ailment are serious illnesses that need to be treated as early as possible. Otherwise, it is necessary to get acquainted with chronic diseases and complications( ranging from parti...

What is epicanthus?

What is epicanthus?

Human races and nationalities differ among themselves by a variety of anatomical features. Among them, one of the main is the structure of the eyes and the skin around them. By the features of the eye device, it is possible to reliably separate one nation from another. The special...