The rapid development of digital technologies, the triumphant march of which is observed all over the planet, leads to the fact that all people work with things that are located very close to them, one might say, almost under their noses. But earlier the outlook of a person was limited only by the blue of the sky above his head and the horizon line. This explains the pathology of the organs of vision, the functioning of which takes place in an unusual mode for them. After all, whether it is a computer, a tablet or even a book, the eyes focus on a close object and eventually get used to working in a similar range of distances. As a result, they may not immediately need correction with the help of optics, which are most often used as contact lenses or spectacles with frames.
Principles of application of optics
It is these accessories that have the necessary refractive power, which helps the rays of the light flux to focus at the required point on the fundus. For these correctionsThe unit of measure for optical power is the diopter. This is a value, the physical meaning of which is that after crossing a convex lens, all solar radiation waves are projected in a single place, the position of which is determined by the displacement of the refractive medium by a specific distance.
Principles of the structure and functioning of the translucent materials of the eye
In the human organs of vision there are natural mechanisms that are able to provide linear oscillations of a natural magnifying glass (crystalline lens) along its visual axis. These changes in size are small (usually no more than 1/50 or 1/75 meters), but they provide the necessary optical power and image clarity. After all, depending on the effort and tension, the refractive indices of the lens are no more than 60-71 diopters (these are nominal values, deviations from which are already called diseases).
The principle of functioning of this visual organ is that as a result of changes in the optical power of all refractive media of the eye, an image is built on the retina and fundus. If the focusing of the rays is carried out further than necessary, then the person will not receive a clear picture, since there is simply not enough space available to build it. Such a deviation is called farsightedness and with it the transmitted visual information is projected already beyond the boundaries of the retina. The opposite case is myopia, with this disease everything happens the other way around, and the formation of a picturehappens too early, resulting in early focusing and blurry images of distant subjects.
Choice of funds for correction
To reduce visual load, a person needs to consult an ophthalmologist. This specialist will conduct the necessary studies and analyzes and perform an initial examination of the eyeball. According to special tables, it will be determined: in what condition is the vision, while diopters can be both in the "plus" and in the "minus". Based on the obtained parameters, the specialist will decide on the recommended methods of prevention or their combination with intensive therapy, which will be aimed at preventing irreversible changes in the eye. In simple cases, things can be completely different. The doctor will limit himself to correction, choosing only the appropriate amount of optical power - diopters for glasses. What will it give the patient? Preventive measures will help maintain his he alth and independently control the development of the disease. After all, diopters are the main indicator of destructive processes, which are better to watch and keep in check than to give them complete freedom.
Vision without limits
After the medical manipulations and the acquisition of the necessary lenses, the patient will stop noticing his illness and will be able to enjoy full vision. However, if deviations from the norm in the eyes are insignificant (no more than ± 1 unit of optical power), then even these measures may be premature. Since in such cases the organsvision, increased fatigue and extra diopters will not be observed - this is not a panacea. After all, it is important to maintain the tone of the eyes in a complex manner, and not only by optical methods.
