Keratoconus is a progressive disease in which the cornea thins and changes shape. The curvature of the cornea is affected, creating either mild or severe distortion, called astigmatism, and usually nearsightedness. Keratoconus may also cause swelling and scarring of the cornea and vision loss. Causes of keratoconus include genetics, trauma and disease.

 

In early stages the conditions is correctible with glasses or soft contact lenses. As the disease progresses, rigid gas permeable contact lenses may be needed to help shape the cornea for clear vision. In some cases, a corneal transplantation may also be necessary. During this procedure, the damaged cornea is replaced with a donated cornea. This operation is successful in about 9 out of 10 people with advanced keratoconus. Even after a transplant, you most likely will need glasses or contact lenses to see clearly.