Nearsightedness: causes of development
The eyes are the mirror of our soul, but this is only a small fraction of what they mean to the human body.
Due to vision, a person is able to receive and process a huge amount of information, navigate in space, distinguish between color scales, highlight light objects, see objects closely and remotely, and is able to navigate in the non-bright time of day.
Frequent blinking of the eyes is the first signal sign that you should pay attention to the level of vision, especially if it concerns children of early preschool age.
Most often, adolescents exhibit deviations in the way they see objects from close and long distances, thereby highlighting concepts: nearsightedness and farsightedness.
If the child looks into the distance, squinting, this is the first sign that he sees the subject not clearly, but blurry - this indicates that he may have developed myopia, previously observant Aristotle called this ailment myopia.
What is myopia and what are its causes? From a medical point of view, short-sightedness is considered to be a situation in which the cornea and the lens refract light rays incident on the eyes, thus forming a focus.
The focus is the point of connection of the refracted rays falling on the retina of the eye, and when the image of the subject is far away - blurry and fuzzy, and when the approach is strong, the light rays decrease, and the person sees clearly the object - the focus is not located on the retina, but directly in front of it.
Drawing attention to children whose nearsightedness is caused by different characters and, accordingly, having a varied scale according to the degree of development, they can be identified by the following types:
- A weak degree of myopia is considered at 3 diopters;
- The average level is 6.0 diopters;
- A high degree occurs when the vision is over 6.0 diopters.
What can influence myopia: the reasons for its development?
There are a number of legitimate reasons that affect our vision. In order to correctly determine the level and extent of development of abnormalities, such as: myopia and hyperopia, should be carefully checked and examined by an ocular specialist - ophthalmologist, as well as not only him.
As you know, the reasons are derived from certain consequences, so there may be the following deviations from the norm:
- fuzzy image when viewing and looking at objects at a great distance;
- blurred vision with unclear outlines;
- bifurcation of lines of objects, frequent darkening in eyes;
- set of appearing small black dots, sharp, unpleasant sensitivity of light;
- eye strain and rapid fatigue;
If these signs are available, then it is worth immediately checking with your doctor. After the examination, the correct cause of vision deterioration is established: either myopia developing at the initial stage, or hyperopia.
Of the types of myopia, axial accommodation should be distinguished, which is considered to be true myopia. Most often, this kind of myopia occurs afterwards taking medication or in people who are in a mature older age, since in this period the visual load decreases. The size of the eye will change, and its shape also changes.
In children of school age, true nearsightedness is not so often and characteristically expressed as in older people, because during that time, the student rests, his vision is restored. When the eyeball does not strain, then its shape is restored and vision is improved.
Therefore, quite often doctors prescribe children not for medical treatment, but compliance with the correct regime.
Myopia: causes of development are divided into the following features of
- Weak structure of the outer dense protein coat of the eye, in the anterior part passing into the cornea, which can not impede the active growth of the eye, since it is noticed that people with large eyes suffer from myopia;
- When the conditions for correct lighting are not respected, as well as the prolonged operation of the eyes, their tension, prolonged concentration on an object that is close to the eyes;
- Hereditary predisposition to such deviations;
- Poor operation of the eye muscle, which is responsible for adjusting the lens at different distances, depending on the refraction of the light rays, and as a consequence, a strong fatigue of the muscle.
Progressive myopia is also distinguished, its development can proceed slowly throughout the growth of the whole organism, while being invisible. Factors that cause the development of progressive myopia, mainly formed from an incorrect mode of operation of the visual organs, frequent fatigue, ecological environment.
Therefore, if a person has noticed that he has violated the clearness of the image of visible objects at a great distance, he should consult a doctor who prescribes treatment for myopia - exercises to restore the previous level of vision, which will need to be performed systematically.
If the ophthalmologist has determined that a person has nearsightedness and farsightedness simultaneously, then most often in these cases, the doctor prescribes a survey in order to establish the angle of deviation.
Then prescribes special glasses for myopia, able to set the point of focusing of light rays, thanks to the built-in axial channel, due to lenses located in the rings that regulate the phase of the movement of light waves.
Do not neglect methods and methods of treatment that ensure correction of myopia at the initial stages of its development. You should visit the oculist, observe visual hygiene, do not forget about minute exercises for rest of the eyes.
Carrying out simple rules, you do not have to resort to cardinal methods of vision restoration: wearing special lenses, surgical intervention, and also to uncomfortable glasses.