Keratoconus is a progressive, non-inflammatory eye disorder leading to corneal thinning and irregular astigmatism. The cornea is the window of the eye, which acts as a covering of its anterior chamber and refracts approximately 60% of the light entering the eye. Keratoconus is marked by thinning and projection of the cornea; which can progress to lead to high myopia and asymmetrical astigmatism.  This condition has an incidence of one in two thousand, is most common in early adolescence and is believed to be caused by a combination of genetics, as well as environmental influence such as allergens.