Keratoconus is a common disease which occurs in between 1 in 500 and 1 in 1000 Americans. In this condition, the cornea becomes weak, progressively thins, and becomes irregular in shape producing high levels of astigmatism. This can interfere with the ability to see clearly. Often keratoconus patients first require glasses, then contact lenses, and if the condition progresses to a severe level, a corneal transplant may be required.
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