For a long period, anti-glare screens were the only eye protection from electromagnetic radiation and reflected light. Today they are not so popular, because they were replaced by special sprays for displays and computer glasses. Modern monitors generally do not need “protectors” for the eyes. But in most cases, the use of protective screens for the monitor is a necessity.
Eye protection
The main function of the monitor screen is to prevent reflected light from entering the eyes. A high-quality screen also increases contrast in order to better distinguish the colors and outlines of characters. Analogs are anti-glare sprays. The surface does not “shine” with them, so it will be convenient to work. But sprays are not intended to improve image clarity; their use does not affect contrast.
All monitors emit negligible x-rays. It is considered safe if a person is not near the monitor for a long time. Manufacturers have reduced the level of rays, but you can not completely get rid of them.
Previously, monitor shields were the only radiation protection, but now they began to produce “safe” monitors. They are labeled low radiation or low emission, which indicates minimal harmful radiation. If this inscription is not available, then a protective screen for the monitor is required. It should be remembered that an electromagnetic field is generated with internal mechanisms. Even monitors marked low radiation cannot exclude this factor.
Therefore, if you have a lot of time to work on such a technique, you need a protective screen for the computer monitor, even with its "security". The best choice would be polarized screens. Whatever the bright light, the screen will be an eye protection. These devices have another advantage: with them it will not work from the side to consider the image.
Materials
An analog of the protective screen are special glasses. They do not allow eye contact with glare and electromagnetic radiation, but cannot improve image contrast. Therefore, protective screens are considered the most comfortable kind. For their manufacture, metal mesh, plastic or optical glass is used.
Mesh fixtures are best not to choose. They serve as protection against electromagnetic radiation, but complicate visual perception. Such a product is presented in the form of a screen of fine mesh that blocks the display. As a result, the eyes get tired quickly.
Plastic protective screens for the monitor for the eyes improve contrast - they create a slight dimming effect. The product reduces the number of flashes that appear on the display, but does not serve as protection against electromagnetic radiation. The lack of plastic is considered fragility, in addition, the material quickly scratches and becomes cloudy.
It is advisable to choose an optical glass fixture . With it, the image quality improves, it acquires clarity, will be protected from electromagnetic radiation. The glass surface will not cloud with detergents, and efforts are required to scratch.
The choice
The device has few requirements, but all of them are important:
- The anti-reflective coating on one or two sides indicates the quality. It is advisable to choose a product that reduces the amount of glare to 99%.
- In addition to anti-reflective coating, antistatic properties are required. The presence of static electricity on the screen will collect dust. This negatively affects the respiratory system; moreover, because of this factor, the contours of the image are poorly visible. Therefore, a screen with antistatic properties is required.
- Another important property is transmittance. The selection of the screen for this attribute determines the illumination of the workplace. The better it is, the lower the bandwidth should be. In high light this indicator should be equal to 30%.
- When choosing a screen protector for a monitor for vision, consider the ease of cleaning. On the anti-reflective surface, spots and fingerprints are clearly visible. If they are difficult to remove, the product quickly becomes dirty. The protective screen should be well cleaned thanks to a special soft cloth.
When is a protective screen not required?
How to determine if a monitor needs extra protection? The equipment must have a certificate of compliance with the MPR-II standard. It established the sanitary characteristics of monitors. You can choose the equipment made according to the Swedish standard TSO-92. This will be a great choice, as the Scandinavian requirements are stricter than the world.
If the monitor has been used for more than 5 years, then you need to replace it or purchase a protective screen. Over time, electromagnetic radiation in the monitor increases. On sale you can find monitors TCO-95. This is also the Swedish standard, but more environmentally friendly materials are used. Such equipment will be more expensive, although there is no significant difference between the goods.
Conclusion
Thus, protective screens are necessary for many monitors. This will protect your vision from the negative effects of technology. In addition, the contrast and clarity of the picture improves with them.