Astigmatism is a common eye condition that's easily corrected by spectacles and contact lenses. Astigmatism is characterized by an irregular curvature of the cornea, the clear structure on the front part of the eye that allows light to enter the eye. This is one type of refractive error. Astigmatism occurs in nearly everybody to some degree. For significant curvature, treatment is required.
A person's eye is naturally spherical in shape. Under normal circumstances, when light enters the eye, it refracts evenly, creating a clear view of the object. However, the eye of a person with astigmatism is shaped more like a football or the back of a spoon. For this person, when light enters the eye it is refracted more in one direction than the other, allowing only part of the object to be in focus at one time. Objects at any distance can appear blurry and wavy.
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