Spectral points or more on computer vision syndrome


American Association of optometric studies published data on the new occupational disease "Computer vision syndrome" - (KSZ). Computer vision syndrome in one form or another is observed in 100% of computer users. His symptoms are familiar to almost everyone who holds the monitor more than 4-5 hours a day. Ophthalmologists note the rapid growth of cases of SGC. For example, in North America with typical complaints of the SGC to the doctors turned to 1992, 10 million people. In 1996 - 15 million people., And in 1998 for 22 million people.

Complaints about people who spend part time at the computer can be divided into two categories: those associated with the eyes or by sight.


The first group include: stinging and the feeling of "sand" in the eyes, pain in the orbits and forehead, pain when moving eyes, red eyes, watery, or, conversely, dry eyes.
The second group includes: causing a dreamy, poor focus, change the color-perception, double objects, rapid eye fatigue. These phenomena are united by the term "eye-strain" (literally - the lack of power). Such complaints are estimated different ophthalmologists, there are at 50-60% of computer users and depend on the time of work and its character. In some of the users of eye-strain is manifested through two hours of work at the computer, the majority - four hours and almost all - six hours before the monitor.


Studies have found that less stress organs of exposed when reading the information and more with its introduction. But the biggest cause fatigue work online.
Protecting a computer user from radiation (X-ray, ultraviolet, radiofrequency, electromagnetic) does not make sense, as modern screens, meeting the requirements of TCO-95 or TCO-99 is practically safe in this regard.

Risk Monitor, and other video display terminals (televisions, gaming devices, etc.), lies in a combination of hard visual work (permanent focus images on the retina) with mikroimpulsnm nature of light radiation.


Even the best and expensive monitor or TV does not save from computer vision syndrome. The reasons for this are many, but they all lie in the field of optics, including - of physiological optics, which studies the process of vision and the work of the visual analyzer in the cerebral cortex. The most harmful effects of modern TV and computer hardware is not the electromagnetic radiation, but the fact that the human eye perceives only the average brightness of the monitor, while the electron beam zasvechivaet each point of the phosphor once during scanning with instant brightness significantly exceeding the average brightness monitor.


Thus, we submit your own eyes the retina by light microscopic "pinpricks". Over time, these "injections" cause irreversible physical damage to parts of the retina (mikroskotomy), especially in its central (macular) part.

Fight with computer vision syndrome can be differentiated only visible to the eye of the spectral correction of radiation monitors, but almost all modern monitors, televisions and priekrannye filters, protecting the rights of invisible radiation, do not produce the spectral correction. In the best case in neutral (gray) filters, which simply lower the brightness.

Applying the spectral correction for the prevention of computer vision syndrome should use the following principles:

* Reducing the transmission of light in the blue region of the spectrum to enhance image contrast and reduce the harmful effects of blue and other harmful short-wave radiation;
* Providing high bandwidth in the yellow-green part of the spectrum to create a spectral-natural environment for the eyes, improve tsvetorazlichie, facilitate removal of stagnant conditions in the vessels of the eye and restore the biorhythm of the visual analyzer;

* Providing a sufficiently high transmittance of red-orange spectrum to enhance visual acuity and increase the sensitivity of receptors of the eye.


A practical embodiment of the protection of computer vision syndrome are special eyeglasses with lenses, filters, which perform the appropriate spectral correction. Standard goggles are designed for people with good eyesight, but the convenience is that the consumer can choose a suitable frame (from the simplest to the most expensive) and to order lenses, filters, even with the necessary diopters.


For those who sunglasses are not suitable for any reason as a means of protection from computer vision syndrome can be used priekranny filter that implements the above principles. The filter has a functional difference compared with goggles that on its surface caused grounded shielding layer.