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Eye Surgery & Aesthetics

Astigmatism

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Astigmatism is caused by an eye that is not completely round and occurs in nearly everybody to some degree. A person's eye is naturally shaped like a sphere. Under normal circumstances, when light enters the eye, it refracts, or bends 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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Normal Vision  - - - Astigmatism Vision

Astigmatism
For a person with only a slight degree of astigmatism, corrective lenses may not be needed at all, as long as other conditions, such as nearsightedness or farsightedness, are not present. If the astigmatism is moderate to high, however, corrective glasses or contact lenses are probably needed.
Treatment
Eyeglasses or contact lenses - correction can usually be easily incorporated into eye glasses. Alternatively, special soft contact lenses called toric lenses can be prescribed. Soft toric lenses have greater light-bending power in one direction than the other. Another option, particularly for higher amounts of astigmatism, is a gas-permeable rigid contact lens. 

Refractive surgery - another method for correcting astigmatism is changing the shape of the cornea through refractive or laser (Lasik or PRK) eye surgery. 



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