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Astigmatism is one of the refractive errors of the eye in which the vision is affected by an irregularly shaped cornea. In such condition cornea inherits the shape of an ellipse rather than a normal spherical shape. As a result of which the capacity of cornea to focus light decreases. Astigmatism there is a difference in the degree of refraction in a variety of meridians. The eye has changeable focal points in divergent planes. The image can be properly focused on the retina in the horizontal plane, but not in front of the retina in the vertical plane. Based on the focus of the principal meridians and on axis of the principal meridians, regular astigmatism and irregular astigmatism are 2 types of refractive errors. In regular condition the principal meridians are perpendicular whereas in irregular condition these medians are not perpendicular.Symptoms of Astigmatism are: • Eyestrain • Headache • Distortion in some portions of the vision filed • The classic symptom of astigmatism is Blurred visionKeratometer or Ophthalmometer, Keratoscope and Videokeratoscope are the devices that are available for testing Astigmatism. There are also many methods that can be used to detect this refractive error. Using contacts for Astigmatism is the best way to treat this refractive error. Several types of contacts such as soft, hard, bifocal, disposable, extended wear and rigid gas permeable are available that are effective for treating astigmatism.Many people prefer contacts because these are the best alternative to glasses. Wearing glasses has now become the things of past. Nowadays people choose contacts because they need not to wear glasses every time for envision. Glasses often hide the beauty of the eyes and consequently change the look of the face. Glass frame can suit few people's personality but not all. On the same side contacts suit everyone's personality without making any difference to the face looks.We know that while performing some activities such as applying make up and wearing headgear it becomes difficult for people to manage with glasses. Sometime these become real source of irritation as people find it difficult to wear then every time even for performing simple tasks. Now the time has changed and glasses are steadily replaced by contacts. Contacts give Astigmatic person a real relief from wearing awkward glasses. By wearing lenses you can be free from carrying Spectacle frames. Sometime it happens that a person forgets to carry frame and in that case it becomes difficult for him or her to see things clearly. Contacts are ideal for curing Orthokeratology (Ortho-K), Lenticular and corneal astigmatism.
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