What is astigmatism, causes and treatments

Date:

2018-03-20 07:03:08

Views:

555

Rating:

1Like 0Dislike

Share:

Table of contents:

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.

Recommended

A tablet from worms – the relevance of the application for the person

A tablet from worms – the relevance of the application for the person

How relevant today, drugs against worms in humans? What kind of creatures these worms, what are modern methods of treatment? We will try to answer these questions, since ignorance in this area is undesirable. Imagine a mummy, which is misleading in k...

What to do if you cracked skin on hands?

What to do if you cracked skin on hands?

Each of us at least once in a lifetime encounter with a small, but very, when the crack the skin on the hands. At this time there are wounds of different sizes, which hurt and cause inconvenience, especially when in contact with water or detergents. ...

Spray Macho man - the key to a proper relationship between the two spouses

Spray Macho man - the key to a proper relationship between the two spouses

Male impotence is a pathological condition associated with abnormal physiological capacity of the penis to reginout and bring sexual partner pleasure in bed.sex impotenceimpotence may not men to pass unnoticed – it usually spoils his nervous sy...

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.


Article in other languages:

AR: https://www.tostpost.com/ar/cars/7586-what-is-the-exam-in-the-traffic-police.html

BE: https://www.tostpost.com/be/a-tamab-l/13550-shto-zh-uya-lyae-saboy-ekzamen-u-d-bdr.html

DE: https://www.tostpost.com/de/autos/13553-was-ist-eine-pr-fung-in-der-verkehrspolizei.html

ES: https://www.tostpost.com/es/coches/13560-que-es-un-examen-en-el-gbdd.html

HI: https://www.tostpost.com/hi/cars/7592-what-is-the-exam-in-the-traffic-police.html

JA: https://www.tostpost.com/ja/cars/7588-what-is-the-exam-in-the-traffic-police.html

KK: https://www.tostpost.com/kk/avtomobil-der/13553-b-l-b-ld-red-emtihan-gibdd.html

PL: https://www.tostpost.com/pl/samochody/13540-co-to-jest-egzamin-do-policji.html

PT: https://www.tostpost.com/pt/carros/13534-o-que-um-exame-de-pol-cia-de-tr-nsito.html

TR: https://www.tostpost.com/tr/arabalar/13556-nedir-bu-s-nav-traf-k-polisi.html

UK: https://www.tostpost.com/uk/avtomob-l/13550-scho-zh-yavlya-soboyu-spit-v-gibdd.html

ZH: https://www.tostpost.com/zh/cars/8252-what-is-the-exam-in-the-traffic-police.html






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."

Comments (0)

This article has no comment, be the first!

Add comment

Related News

Protamine sulfate: description and instructions

Protamine sulfate: description and instructions

What a medicinal substance, such as Protamine sulfate? Instructions for its use, as well as the form and indications to be indicated below.Composition, description, formWhat is Protamine sulfate? This solution, produced in the for...

Thyroid symptoms in women, and diseases causing them

Thyroid symptoms in women, and diseases causing them

Problems with the thyroid gland in women is not uncommon. But, as a rule, not knowing the symptoms, many people simply ignore them, and as a result the disease develops. There are a number of reasons why thyroid symptoms in women ...

Pregnancy is not, and the test is positive: causes

Pregnancy is not, and the test is positive: causes

pregnancy Test positive, pregnancy is not. Why? Such happens in practice of any doctor. Causes of false-positive test can vary depending on various circumstances. What about pregnancy tests? What is HCG?the Principles of action al...

What is the ratio of weight and height is normal?

What is the ratio of weight and height is normal?

the Optimum ratio of weight and height were interested in the humanity always. There are many methods of calculation of ideal body weight, but none of them is not entirely accurate. You must take into account not only numbers, but...

The main symptoms of mastitis of the breast

The main symptoms of mastitis of the breast

a Huge number of women worldwide suffer from mastopathy of the breast. The disease is caused by disorders of the right balance of hormones. As a result, in the chest occur benign. According to statistics, this disease affected 80%...

Why itchy breast: scientific and popular explanations

Why itchy breast: scientific and popular explanations

Why itchy breast: the wisdom of the peoplesigns of people – a storehouse of ancient wisdom, a lot of people tend to trust them. They can find an explanation for any situation, including such trivial as an itch in his chest. ...