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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. 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.
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Treatments include corrective lenses and refractive surgery. Corrective lenses include eye glasses and Contact lenses. Laser-assisted in-situ keratomileusis (LASIK) is a procedure in which a doctor uses an instrument called a keratome to make a thin, circular hinged cut into your cornea. In Photorefractive keratectomy, the outer protective layer of the cornea is removed before using an excimer laser to change the curvature of the cornea. The Extrapolated Prevalence of Astigmatism in India is 176,206,527 .Prevalance Rate for Astigmatism is approx 1 in 6 or 16.54% or 45 million people.