Astigmatism - is a disease of the eye that is corrected using contact lenses, glasses or surgery.
Optometrists believe that almost all the inhabitants of our planet have some degree of astigmatism, but the eighty-five percent of the people it is quite a small quantity (up to one diopter) which practically has no effect on visual acuity, but the remaining fifteen percent are in need ofvision correction using lenses, glasses or surgically
Astigmatism causes of
Astigmatism arises from - the irregular shape of the lens of the cornea (less lens).If there is no deviation, the light falling on the retina of the eye is refracted without deviations, which lets you clearly see the observed object.In the case of diseases of astigmatism, the light falling on the retina of the eye is refracted unevenly, causing distant objects are seen blurred and indistinct.
the disease affects both adults and children.In most cases, astigmatism is inherited from - which is why it is called congenital.A
- The pressure on the eyeball eyelids
- extreme close eye to the different subjects (including the use of the computer)
- Rough scarring that occur in the cornea after surgery on the eyes,and after eye injury
As mentioned earlier, a person having a small degree of astigmatism may simply not to notice, as is gradually getting used to see everything in a stretched or vague form, not even guess about the existing problems with thevision.
The most common symptoms are:
- Rapid eye fatigue
- Frequent headaches
- Blurred vision at any distance
However, these symptoms can be signs of any - any other disease, so in the event of their occurrence must alwaysconsult your ophthalmologist as if astigmatism is not treated in a timely manner - perhaps a sharp drop in the development of vision and strabismus
Astigmatism is nearsightedness, farsightedness, and even mixed: on one axis myopic, and on the other - long-sighted.
Because - because astigmatism develops very slowly - must be checked by an ophthalmologist annually.The final diagnosis is established after checking visual acuity, which is carried out using special cylindrical lenses (determining the difference in the curvature of the cornea), and special tables
modern ophthalmology corrects astigmatism in three ways: with the help of contact lenses,points and the method of surgery.
contact lenses and glasses are selected purely individual, but with a high degree of astigmatism, these methods are carried by people is very bad because what begins to feel dizzy and greatly hurt the eyes.In this case, only surgical intervention.
Types of surgery: Excimer laser, laser coagulation, keratotomy, Termokeratokoagulyatsiya.
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