Blurredand distortedvision,frequent change in glass prescription.

Collagen fibers help hold the cornea in place and keep it from bulging. When these fibers become weak the cornea becomes progressively more cone shaped.

Keratoconus is a progressive disease in which the normally round cornea thins and begins to bulge into a cone-like shape. This cone shape deflects light as it enters the eye causing distorted vision.

It is the wound in the cornea due to trauma or infection.

The cornea is the clear, dome-shaped surface that covers the front of the eye