[Keratoconus in a young patient with itching eyes and blurred vision].

Keratoconus is an asymmetric bilateral eye condition that results in an increase in corneal curvature and a decrease of corneal thickness. Increasing myopia and astigmatism result in a decrease of visual acuity. The condition frequently begins in the second decade, gets worse during the next few years, and stabilizes about age 35. Risk factors include eye rubbing, and familial predisposition. Contact lenses or corneal transplants are two possible treatments. Nowadays, the illness can be stopped through corneal cross-linking.