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Astigmatism
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Astigmatism is a common, mild and generally easily treatable imperfection in the curvature of your eye. The condition can cause blurred vision. Astigmatism occurs when the front surface of your eye (cornea) or the lens, inside your eye, has a slightly different surface curvature in one direction from the other. Instead of being even and smooth in all directions, the surface may have some areas that are flatter or steeper.
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Signs and symptoms of astigmatism may include: Blurred or distorted vision, Eyestrain, Headaches. The eyes have to be checked more frequently in patients with Astigmatism problem. Astigmatism is a type of refractive error. In astigmatism, the cornea or lens is curved more steeply in one direction than in another.
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In corneal astigmatism, cornea has a distorted shape. In lenticular astigmatism, lens is distorted. Either type of astigmatism can cause blurred vision. Blurred vision may occur more in one direction, either horizontally, vertically or diagonally. Treatments include corrective lenses and refractive surgery. In Germany, the prevalence of astigmatism seems to be somewhat lower than in Asia and Europe.The prevalence rates of astigmatism differed significantly between all investigated age groups: it was 0% in children aged 2–6 years, 5.5% in children aged 7–11 years, 21.0% in adolescents and 41.3% in adults aged 18–35 years.The prevalence of astigmatism in females (23.6%) was significantly higher than in males.