What is astigmatism, causes and treatments

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2018-03-20 07:03:08

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Origin

Already from the name you can easily guess what is astigmatism of the eye and what it involves. Original name of disease derived from Latin "stigma", which means "point". In this case, refers to the focus point of the image. This name is given not by accident, because the essence of the disease consists in an incorrect focusing of the beam of rays.

Characteristics of

The Astigmatism of the eye is one of the most common vision diseases in the world. In fact, in varying degrees, they suffer almost half of all people on Earth. Many the disease starts in early childhood. To understand what astigmatism, the easiest way, examining basic information about the structure of the eye. As you know, the human eye has two optical systems for light refraction. This cornea and lens, are equally important to build the right image on the retina. Both natural design is unique, each of them has its own characteristics but one thing in common they have is the so - called notion of curvature. The cornea of a healthy human has a structure with a nearly perfect curvature. Thus, the light beam passing through it, precisely focused on the retina. People suffering from visual impairment, these figures changed.

What is the astigmatism from a scientific point of view

So what is astigmatism? This vision disorder occurs regularly, but to explain it very difficult. In rare cases, the reason lies in the irregular shape of the eye lens. But in most of them the disease is directly related to the optical distortion that is common to all lenses. And as the cornea of the eye also has a spherical shape, such a concept is inherent in her. The correct form for it is considered the absolute spherical, able to refract the light rays in any plane the same way. But there are also tapered, or, conversely, elongated. So the cornea cannot properly focus the image, its curvature at certain places varies, and hence the rays reaching the retina are obtained unequal length. This causes a distortion of the real view of objects around. In an eye suffering from astigmatism person no single focal point, unlike the eyes of a healthy person. The fuzzy focus the image on the output is unclear and like with blurred contours.

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What is astigmatism purchased type

It is Known that this disease is inherent not only to adult men: it is frequently diagnosed in children. It can be congenital or acquired astigmatism. The latter occurs when the physical injury that caused scarring of the cornea, and after botched operations due to improper surgical intervention.

Congenital astigmatism: what it is and how it manifests itself.

In this case, when we are talking about a congenital defect of vision, it comes in heredity. As a rule, astigmatism suffer from birth those children, whose parents, too, there was the disease. But in congenital type of the disease blurred vision small and virtually does not degrade its sharpness, and therefore goes unnoticed. Many people throughout his life are not even aware of its existence.

Symptoms of astigmatism

Symptoms of this disease is manifested not only in the obvious deterioration of vision, which without timely intervention, is able to progress to a more serious stage. Astigmatism also often accompanied by long-lasting headaches with visual load, excessive tearing, inflammation of the eyes and edges of the eyelids. It is not excluded the appearance of conjunctivitis, pains in the eyes and General fatigue.

Treatment

Currently widely used three methods of treatment of astigmatism:

spectacles;

- the wearing of corrective contact lenses;

surgery.

In the first two cases use complicated lenses and glasses having a cylindrical structure. The problem is that while they do not appear in widely available in our country. You have to make these glasses and lenses to order. Usually they have to change more than once to pick up a suitable, but they are not cheap. In addition, many patients develop intolerance only exacerbates the basic symptoms of astigmatism: eye discomfort, headache or even dizziness.

Operative intervention has a notable advantage. It happens with the current development of technologies quite quickly and relieves the patient from the need for further vision correction through other means. The curvature of the cornea in this case is eliminated physically. Surgical method for the treatment of astigmatism has the best efficiency among all available, providing maximum results in a short period of time.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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