Keratoconus, a progressive thinning of the cornea, is the most common corneal dystrophy in the U.S., affecting one in every 2000 Americans.
Keratoconus is more prevalent in teenagers and adults in their twenties. It arises when a focal area of the cornea thins and gradually bulges outward, forming a rounded cone shape. This abnormal curvature changes the cornea’s refractive power, producing moderate to severe distortion (irregular astigmatism) and blurriness of vision. This eye disease may also cause sudden swelling and a sight-impairing scarring of the tissue.
The male to female ratio is approximately 60:40 and the average age of diagnosis is 28.3 years of age.
The prevalence is 1:2000 in the United states but maybe as high as 1 in 375 in the Netherlands and 1:20.8 in Saudia Arabia