The doctor told at what distance the computer monitor does not harm eyesight

A man in front of a computer monitor - 1920, 11/07/2021

MOSCOW, 7 Nov – On average, Russians spend at a computer from 6 to 7 hours a day – in order not to spoil your eyesight with this mode of operation, you need to be 50-60 centimeters from the monitor, said the doctor of medical sciences, ophthalmologist, chief physician “Invitro-Moscow“Sergey Khomyakov.
“Place the computer monitor screen straight in front of you. The top edge of the screen should be at the level of your line of sight. The distance from the eyes to the monitor should be about 50-60 centimeters. If you are working on a laptop or tablet with a screen diagonal of 10-12 inches, then the distance can be equal to Harmon’s distance – this is the distance from the elbow to the thumb, or on average 40-45 centimeters, “Khomyakov explained.
He noted that in recent years, much attention has been paid not to the level of illumination, which is standardized, but to the spectral composition of light.
“Our organ of vision has evolved in the conditions of the natural spectrum of white light, which is formed after the passage of sunlight through the atmosphere. Accordingly, the most ergonomic light sources are as close as possible in the spectrum of the emitted light to the luminous flux of the natural spectrum. Light pulsation index is no less important – you need to choose lamps with zero pulsation – it is with this kind of illumination that the eyes and the visual system as a whole are least tired, “the doctor added.
He clarified that when it comes to artificial light sources, these criteria are met by induction lamps, incandescent lamps and some modern LED lamps. The light source when working at a computer should be background, diffused. The luminous flux emitted by a 60-watt incandescent lamp or its modern equivalent is quite sufficient. That’s about 600 lumens.
“When reading and working at a computer, the most important factor is the background from which a person is reading. The optimal background of a sheet of paper should be yellowish, have contrasting black letters with special” notches. “Today, the vast amount of information, including text, people receive through monitor screens, the background color of which can be adjusted. Much depends on the time of day and the state of the optical environment. For example, in the evening it is better to read with “warm” light, and patients with the beginning of changes in the lens during reading will be more comfortable with colder light, which contains more short-water blue rays “, – concluded Khomyakov.

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