Computer vision
This is the name of the problem caused by work at the computer. And even if the name for you is new, with the nature of this phenomenon, you certainly had the honor to meet. Rudiments of disruption appeared long before the advent of various screens in our life. Since the invention of books, the eyes have begun to experience a qualitatively different kind of stress. Previously, the focus of view was constantly "running" from one subject to another. From a bird to a daisy in the grass, a stream or a wild animal in the forest more often, a grasshopper at his own feet ... Changing the distances provided a continuous adaptation of the muscles of the eyes. Book pages, TV, computer exclude constant settings and reconfigurations. The focal length of the eyeball at these moments (length in hours) practically does not change. The load is monotonous and ... excessive. In addition, instead of the three-dimensional image, here we get only 2G. And by nature we are given binocular vision. Simply put, this is the ability to see simultaneously with two eyes, which provides a three-dimensional view of things. In order to consider an illustration or text, one of the pair of optical instruments given to us is sufficient. Another, unclaimed, is gradually turned off from work. In other words, it starts to see worse.
Returning to the syndrome
In problems with vision, it is customary to blame computer radiation. But he has an alibi - a protective coating on modern screens. Although without a PC all the same it was not. The fundamental factor is the pixel nature of the image. In appearance, a homogeneous picture (picture, photo or text) actually consists of the smallest points. The intensity of the color of each of them decreases from the center to the edges. Together they form a mosaic with blurred contours, difficult for visual perception. The eyes have to change the focus again and again, adjusting thousands of times during the day to the images on the monitor. This "gymnastics" overstrains the visual muscles. Printed pages are deprived of such a shortcoming. So in the conflict of ophthalmologists and ecologists - to throw on the printer or read from the computer screen, take the side of the first. Among the other accused:
The proximity of the objects of observation. The smaller the distance from you to the object of interest, the greater the strain of the eye muscle. And, in addition, so that the pair optical device produces one common image, the viewpoints should form the desired angle of convergence. And the closer the object, the more difficult this task. For example, it is most comfortable for the eyes to study what is happening 25 cm from them. 10 cm from the pupil is the lower permissible limit. And if your display is moved closely, the muscle responsible for accommodation (that is, adapting to different distances) will weaken over time. Deficiency of natural hydration. Normally, the protective shell of the eye requires lubrication 16-20 times per minute. With a head immersed in the monitor, we blink 6-8 times during the same period. A rare "bathing" leads to the fact that our eyes begin to experience a deficit of water, oxygen and nutrients. Dry office air enhances the evaporation of moisture from the cornea of the eye. About her drying, she lets you know by irritation, then by reddening, then the protective mechanism works - abundant lacrimation. Objects "float", are doubled, and the general condition leaves much to be desired. Neck with back - and those whine. A number of drugs (antiallergic, antispasmodics) can cause and intensify the effect. And then you remember the drops. They are moisturizing (artificial tears - these are exactly what you need) and just removing redness. The latter improve the appearance of the eyes due to the narrowing of the vessels at their surface. But their formula is not always aimed at reducing dryness and irritation. Moisturize your eyes with "artificial tears" three to four times a day. Sometimes such means cause a backlash - strengthening or provoking what they are called upon to fight. If a similar situation has arisen and you, stop using and go to the oculist. And if you wear lenses and are forced to sit at the computer for a long time, do not be too lazy to replace them with glasses. At least in the evening and at night, when the tear glands are the least active.
Office Control
Create a favorable environment, working on the following "control buttons":
Illuminations
Solar or artificial, the lighting should not be bright. So all unnecessary (emphasize - unnecessary), turn off the curtains, lower the blinds. Let the light be soft, pleasant to the eyes. It's great if the soffits are installed on the floor. It's better than on the ceiling. Fluorescent lamps ^ (otherwise they are called fluorescent lamps) use as needed. For the eyes, they are not sugar. Those that are full of the spectrum are more pleasant. By their impact, they are closest to sunlight.
Glare
To cope with the reflections on bright white walls and other surfaces, paint them in a darker tone, then apply a matte finish. In public institutions, you are unlikely to be free to choose, but at home you have the right to dispose of and create an interior that suits your eyes. The monitor, if there is such a possibility, set sideways to the window - you will avoid the glare that comes from the sitting face or back to the source of street light. Choose a display with anti-reflective coating and glasses - with the same. Their job is just to eliminate the glare. If you have an LCD (liquid crystal), consider that lucky: these screens do not give highlights, flicker and have better contrast. Avoid also the seats in front of the fan, directly under the running air conditioning or in a draft - in short, near everything creating air currents.
Friendly display
If he is not like that, he could well become. They are rightly called the one whose diagonal is from 50 cm and above. With an ordinary computer (not an LCD), you will have to work and install the flicker protection yourself by selecting the appropriate parameters. In particular, bet on the maximum refresh rate (at least 85 Hz). For the LCD, 60 Hz is enough - its system itself maintains the optimum frequency. From time to time you need to check the safety of the settings with a normal computer. Pay attention to the distance between the pixels on the screen (that is, the step of the location of points). The lower it is, the more visibility. Adjust the brightness and contrast. You will be helped by a white page on the display. If it is lit, then the color is too saturated - reduce the intensity. If it seems dull and gray, on the contrary. The closer its illumination to the brightness of the environment, the better.
The optimal color combination for reading is traditional - black text on a white background (alternatively, dark on light). The font size is set in the interval 12-14, and the computer itself is moved to a distance of 60-90 cm from the face. In time, clean the screen of dust and debris - they degrade the clarity of the image.
Holiday season
Like any other, the eye muscles require alternating load and rest. Choose your relaxation program. Every twenty minutes focus on the subject at 6 meters from you and stay on it for 20 seconds. Once in half an hour, cover your eyes for 20 seconds or longer. Blink slowly, measured ten times - do such pauses in 20 minutes. Look at the object in the distance for 10-15 seconds, look at the one that is near - by the same number, again look at the first one. Strip ten times. Sit down or stand up straight, look at the small object in the distance. Now take a pencil, take the distance of an outstretched hand and contemplate its tip. Slowly bring it to your eyes, following the movement. Delay for 10 seconds in the minimum permissible proximity, when the pencil is still clearly visible, does not double, but already reveal the tension and heaviness in the eyes. Return it again to the distance of the outstretched hand - leave it there for ten seconds, bring it to your face. Repeat ten times, and then look again at the distant object (chosen at the beginning of the exercise). Do this cycle again. First, practice five minutes in the morning and in the evening. Within two weeks, bring the gymnastics time for the eyes to 15 minutes.