Vision problems based on foggy and distorted eye sight appear when eye lens or cornea are not as curved as they should be in order to provide perfect sight. In medical terms, this condition is known as astigmatism, and it is a type of refractive error (together with myopia and hypermetropia, which refer to near-sightedness and far-sightedness).
Astigmatism is not an uncommon eye problem, since a large number of people wearing glasses may have this problem to a lesser or greater degree. There are cases when astigmatism is an isolated eye condition, but still, it is not unusual for it to appear combined with other refractive errors mentioned above.
Condition of astigmatism can have two versions:
Version 1.
Cornea has the shape which involves higher level of curvature in one
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direction, when compared to curvature level in the other direction. This condition is known as regular astigmatism. Its effects can be reduced by usage of: • Contact lenses • Glasses Version 2.
Another type of unordinary corneal curvature represents condition when curvature becomes steeper in the bottom of cornea. Additionally, cornea may be curved in various directions, instead of only one. Both of these situations are types of irregular astigmatism, which cannot be reduced by glasses, but only with contact lenses. This condition usually appears after an eye damage which results with a mark (scar) in the area of cornea.
Causers of astigmatism
Astigmatism may appear both after different eye damages and as a result of complications during the eye surgery. However, it is more common for it to be a congenital eye condition, which means that people usually are born with refractive errors of their eyes. As it is already said, common causers of astigmatism are unusual shapes of lens and cornea (which is a transparent part of eye’s frontal area).
Difference in shape of cornea
When light rays cannot perfectly focus while entering the eye, picture which we get becomes foggy. Normal cornea shape usually resembles the globular shape (ordinary ball), but when it is not regularly curved, it significantly changes its shape (rugby ball model).
How is astigmatism
discovered? In order to notice problematic eye changes or congenital problems with sight, eye test should be performed. Sooner the condition is revealed, easier it will be to deal with its consequences. At the same time, its effects will not be as serious as if you discovered it after larger period. This means that it is significant both for adults and children to have eye tests from time to time, in order to notice the changes on time. Untreated astigmatism can lead to difficulties both with concentration and reading. How to deal with astigmatism? Usually, astigmatism doesn’t have to include surgeries or other treatments in order to reduce its effects, since its symptoms are negligible. Adults may have laser eye surgery in order to eliminate effects of astigmatism, but its costs cannot be covered by the NHS. If you have more serious sight problems provoked by astigmatism, lenses and glasses can help. Consequences of astigmatism People who spend much time focusing their eyes on something, such as computer working or reading, have greater chances of dealing with astigmatism consequences. If you do not pay attention to your eyes and do not treat astigmatism properly, it may provoke some complications, such as: • Eye straining • Eye tiredness • Headache
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