A condition in which the clear tissue on the front of the eye (cornea) bulges outward.
With keratoconus, the clear, dome-shaped tissue that covers the eye (cornea) thins and bulges outward into a cone shape. Its cause is unknown.
Symptoms first appear during puberty or the late teens and include blurring vision and sensitivity to light and glare.
The progression can be stopped by Collagen cross linking in which riboflavin drops are instilled in the eye and it is subjected to medically safe ultra violet light in order to harden the cornea .
Vision can be corrected with glasses or contact lenses early on. Advanced cases may require a cornea transplant.