The cornea is the front, outermost layer of the eye. Just as a window lets light into a room, the cornea lets light into the eye. It also focuses the light passing through it to make images clear and sharp.
Corneal problems can occur in anyone regardless of age. Sometimes due to disease, injury or infection the cornea becomes cloudy or warped. A damaged cornea, like a frosted or misshapen windowpane, distorts light as it enters the eye. This not only causes distortion in vision, it may also cause pain.
When there is no other remedy, doctors advise a corneal transplant. In this procedure an ophthalmologist surgically replaces the diseased cornea with a healthy one to restore clear vision.