Eye accommodation and false myopia

Let's talk about vision. Our eyes give us the ability to clearly perceive near and far objects. At the heart of this lies the accommodation of the eye or, in translation into Russian, adaptability. Briefly, its mechanism is to change the shape of the lens. Its shape changes with the reduction of the so-called ciliary muscle, becoming more convex, and when the muscle relaxes, the crystalline lens flattenes. Due to a change in its curvature, the light rays focused by it fall exactly on the retina. This provides us with a clear and clear vision.

Let us consider how the accommodation of vision "starts up" when we remove or approach the objects we are looking at. A fuzzy image of an object on the retina serves as an incentive for the inclusion of accommodation. The signal from the retina on sympathetic nerves enters the brain. The brain on the oculomotor nerve sends a reciprocal impulse to the ciliary muscle. The lens under its influence changes its thickness, and the image focuses on the retina, becoming clear.

The mechanism of accommodation can also include a sense of the distance of the object, a change in its magnitude when approaching or removing, and some other mechanisms. With age, the accommodation of the eye decreases. In children it is considered to be the highest. To the old age the lens loses its ability to change its shape. As a result, the person develops hyperopia. He sees better remote objects, and those that are at close range, he sees unclear.

In some cases, the lens in young people loses the ability to change their shape. This condition is known as a spasm of eye accommodation , or false myopia (myopia). It is often the reason for contact with the oculist, especially among schoolchildren. The cause of spasm of accommodation is often the overwork of the eyes. It can also be the result of tension when looking afar, when reading lying, with long work at a very close distance, reading in poor light conditions, working in very bright light.

There are several types of accommodation spasm. It is physiological, artificial and pathological. In the first case, the accommodation of the eye is disturbed by hyperopia or astigmatism, when the body tries to correct it. In the second case, the cause of spasm is the effect of medicinal substances, for example, such as pilocarpine. After the termination of their action, it disappears. In the pathological spasm of accommodation, the refractive power of the eye is sharply increased. This is accompanied by visual impairment and false nearsightedness.

False myopia develops more often in young people and is associated with eye fatigue and trauma. It leads to rapid fatigue, headache, irritability. How long has it been going on? It depends on the state of the person, the mode of his work and life. Sometimes the broken accommodation of the eye persists for several months, and sometimes even years. At children it happens in the form of proof school short-sightedness. The child loses sight acuity in the distance, and at close range sees well. In addition to eye symptoms, there may be manifestations of a general nature. They are expressed in vegetative-vascular disorders, mood instability, development of asthenization of the organism. Sometimes there may be headaches and fainting.

Disrupted accommodation of the eye is treated with special lens training sessions. For this, modern devices are used, which are equipped with oculist offices. Especially showing such lessons for children. Medicines are prescribed by the doctor individually in the form of special drops.

What to do to avoid spasm of accommodation? To do this, all work related to the voltage of vision, conduct with good lighting and proper planting. Try not to overwork your eyes. Pay attention to the general strengthening of the body, the rational organization of studies and recreation. Do not neglect sports!

A different view to you!