About 80% of information about the world people get through vision. Visual perception is a complex system, which is studied even by different sciences. What we spoil our eyesight every day will be prompted by ophthalmologists.

Monitor, tablet, smartphone, e-book.

The harmful impact of technology on the eyes of everyone is well known since childhood: we all remember that you should not approach close to the TV. According to Rachel Bishop of the US National Eye Institute, when you look at the screen, the following occurs: 1) you blink less, which leads to the drying of the cornea; 2) the eye is focused on one place, the eye muscles are overextended, and muscle degradation is one of the causes of myopia; 3) the eyes expand more than usual, and the harmful effect on them increases. In the case of an e-book, the damage from the illuminated screen is added to what has been said: if the light is too bright and contrasting, the eyes suffer.

Reading and lighting.

In classical ophthalmology, prolonged reading is a risk factor for developing myopia, especially at an early age. According to children's ophthalmologists, you need to read at the desk, with a straight back, and the distance from the eyes to the book should be 40-45 cm. At the same time, it is best that a natural light falls on the book, and there should be no shadows. It is natural light - the best lighting for reading. In this case, continuous reading should not be more than 45 minutes. Bad lighting impairs vision precisely in connection with reading: the light source must be sufficiently bright and uniform. Especially harmful is reading lying, since it is impossible to comply with all the recommendations given. Plus, because of the wrong position of the eyes in relation to the object - the book - will develop astigmatism. As for the font size, it should ideally be such that the eyes are not overextended during reading, and in this case it is important not only the size - 13 - 14, but also the line spacing.

Ultraviolet.

The sun can cause severe skin burns and even lead to cancer, but a long exposure to ultraviolet rays also spoils the eyes. True, this does not apply to outdoor walks on a sunny day, when the sun opposite supplies eyes with vitamins and activates the exchange of important substances. Excessive ultraviolet radiation, as doctors say, leads to the degradation of retinal cells. At a young age, this is often unnoticeable, with age the ability to regenerate deteriorates.

Dangerous diet.

Fast food: regular hamburgers and Coke, that is, dietologically, saturated fats and sugar - the world's first products that spoil the blood vessels. And microcirculation in the vessels of the eye is the key thing for their health. In addition, oculomotor muscles can be prone to obesity. Plus, all such products are completely devoid of the main eye vitamin A.

Smoking.

This bad habit increases the risk of cataract and retinal diseases, and also leads to degeneration of the visual muscles and the optic nerve. In addition to the obvious irritating effect of smoke, smoking leads to circulatory disorders, and good blood microcirculation is one of the main pledges of good vision.

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