Some people consider "horrors" about the dangers of computers by the commercial course of the suppliers of these security measures (computer glasses). To understand whether they are necessary, we turn to the scientifically proven data.
Why do we need computer glasses, do they help?
- The computer screen emits light in the range from purple to red, i.e. the whole spectrum. But the greatest load for the eyes has violet and blue short-wave rays, adjacent to ultraviolet radiation. The destructive energy of such radiation with intensive work at the computer leads to various eye diseases.
- It is proved that these same short-wave rays are scattered and refracted on their way. Therefore, almost do not fall into the focal point of the retina, which penetrate the green and yellow rays (long-wave). As a result, the monitor image loses clarity.
- According to the researches of Academician Fedorov, the red area of the spectrum promotes the acceleration of metabolic processes, the restoration of cells of the eye tissue. Those. these rays do not have a detrimental effect.
Thus, if you remove from the monitor from the monitor the harmful violet and blue rays, you can get rid of the heavy load on the eyes and reduce the proportion of light scattering, which will increase the clarity of the image.
Therefore, protective computer glasses are useful and really effective. But only not to protect against electromagnetic interference, as some unscrupulous sellers of fakes assure, but for selective transmission of the emitted color spectrum.
So, thanks to the special filtering composition of the lenses coating of these glasses, the following is achieved:
- absorption of hazardous ultraviolet radiation;
- the transmission of the red-orange part of the spectrum favorable to the eyes;
- Increase in color;
- decrease perceived brightness of the monitor, glare;
- providing a better contrast of the visible image.
As a result, the likelihood of eye diseases decreases, overall fatigue decreases, and work capacity increases (by approximately 30%).
How to choose computer glasses?
When selecting computer glasses, you must first visit an ophthalmologist. After all, not all of them are the same, and here it is necessary to take into account the particular person's vision. What computer glasses are better for you, can determine in the salons of optics, where the consultation of the oculist is provided.
Computer glasses can be with or without diopters. It is possible to combine glasses with contact lenses without additional strain on the eyes.
Lenses for computer glasses are of these types:
- monofocal;
- bifocal;
- variofocal;
- trifocal;
- progressive (multifocal).
There are glasses for the computer of different degrees of dimming. You can also pick up any frame that fits your face.
Additional application possibilities
In such glasses it is comfortable in artificially lit rooms, especially with fluorescent lamps. Also, computer glasses can be used outdoors in cloudy and sunny weather. Therefore, they can be called universal, suitable for permanent wearing. There are no contraindications to them, they are also recommended for children while spending time at the computer.