Keratoconus is a condition in which the central cornea thins and takes on an irregular shape.  Any light that passes through the cornea becomes distorted, thereby making this condition difficult to treat with glasses or conventional contact lenses.  Keratoconus usually develops in the late teens and early twenties and, in it’s early stages, presents as a slight blurring of vision and an increased sensitivity to light. As the disorder progresses, vision deteriorates and light sensitivity often increases.

Although the true incidence of keratoconus is not known, it is estimated by some to affect one in every 2000 people.

Keratoconus in its earliest stages can be treated with glasses or conventional contact lenses.  In later stages, it is generally treated with gas permeable (GP) lenses.