What is a spasm of accommodation The oculist on a prophylactic medical examination has diagnosed such a diagnosis to her daughter 11 for years. Who was there

What is a spasm of accommodation? The oculist on a prophylactic medical examination has diagnosed such a diagnosis to her daughter 11 for years. Who was there?

What is a spasm of accommodation? The oculist on a prophylactic medical examination has diagnosed such a diagnosis to her daughter 11 for years. Who was there?

  1. Accommodation is the ability of the human eye to have a good quality of vision at different distances.

    The eye is a complex optical system consisting of two lenses: the cornea refracting the light rays together with the moisture of the anterior chamber, and the lens, as well as the light-conducting structures: the moisture of the posterior chamber and the vitreous. Ultimately, the quality of vision depends on the characteristics of the refraction and the carrying of light rays falling on the retina.

    The eye's work should correspond to the daily needs of the person. At the core of this ability is accommodation. Due to accommodation, it is possible to see objects located at a long distance, middle and near.

    The explanation is the accommodation by changing the shape of the lens. When a person looks afar, the ciliary muscle is in a state of relaxation, while the zinn ligament is in a state of tension, pulling the capsule of the lens. It is the elongated shape of the lens that reduces the refractive power of the eye and allows the light beams to focus precisely on the retina, providing good vision in the distance.

    When accommodation begins to work, the tension of the ciliary muscle occurs, as a result, the zinn ligament, on the contrary, relaxes and the lens, due to its elasticity, assumes a more convex shape. Thus, conditions are created for focusing on the retina of images of objects located at close range.
    The work of accommodation is controlled by both sympathetic and parasympathetic parts of the autonomic nervous system. At the same time, the parasympathetic system plays the main role in the reduction of the ciliary muscle. The sympathetic nervous system controls the metabolic processes in the ciliary muscle and, to some extent, counteracts the contraction of the ciliary muscle.

    Accommodation is the main mechanism, the so-called, dynamic refraction, which is characterized by a clear focus of the image of objects located at different distances, relative to the retina. For example, if the lens has insufficient curvature, and there is no clear focusing of the object on the retina, then information about image blurring enters the central parts of the autonomic nervous system. The nervous system, in turn, sends a signal to the ciliary muscle, at the expense of which the refraction of the lens changes. As soon as the image on the retina becomes clear, the stimulation of the ciliary body stops.

    If the accommodation is as relaxed as possible, the vision is fixed to a further point of clear vision, with a gradual tension of accommodation, reaching a maximum, the eye is set at the nearest point of clear vision.

    The distance between the next and the nearest points of clear vision is called the accommodation area. It is most common in people with normal refractive force of the eye, the so-called emmetrops, and in the farsighted. With emmetropia in a relaxed state, the eye looks at infinity, and at maximum stress on a very closely located object. In the case of hyperopia, already looking into the distance, a person develops a ciliary muscle strain that corresponds to the degree of farsightedness and even more increases when looking at closely located objects. With shortsighted accommodation is not developed enough, good eyesight has a short distance, and, the higher the nearsightedness, the more this distance becomes even smaller.

    In the event that a person is in total darkness, the ciliary body retains a slight tension while being in a state of readiness.

    With age, the ability to accommodate decreases. First of all, this is due to the so-called presbyopia, in which accommodation is gradually weakened, due to which the quality of vision at a close distance deteriorates. Typically, such problems begin at the age of 40 years, and last up to 60 years, after which progression stops. This is due to changes in the ciliary muscle itself, as well as the crystallization of the lens and the reduction of its elasticity. With farsightedness these

  2. My daughter recently had a spasm of accommodation, and we thought that our eyesight fell again - we began to see worse in old glasses, we wrote out new ones, more feasible. And put it in the eye department. There the spasm was removed, and it turned out that new glasses were not needed, while in the old ones it was good. Vision did not deteriorate, but there was this very spasm of accommodation.
  3. The spasm of accommodation is when a person often experiences stress, many simply can not accept this world as evil and dishonest!
  4. Simply put, the spasm of accommodation is the fatigue of the eye muscle. In order to remove it, you have to strain your eyes less. The oculist will prescribe a treatment, give exercises for the eyes. And if you regularly observe and follow the visual regime, your vision will recover.

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