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Keratoconus is a disorder that typically affects both eyes in which the cornea becomes thinner over time; eventually leading to a cone shaped protruding structure instead of a normal spherical one. As this abnormality progresses one's vision becomes very blurry and can only be treated with hard contact lenses. Glasses and soft contact lenses usually do not provide enough support for one to have useful vision. In advanced cases of Kerotoconus, even hard contact lenses are no longer capable of correcting vision, in which case a corneal transplant may be indicated.


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