Keratoconus is a condition that alters the shape of the cornea, the clear window of the eye. In keratoconus the cornea tends to be thin and its shape resembles a cone or a nipple. Patients usually notice reduced vision, mostly due to astigmatism. It is more common in young men, commonly in the second or third decade of life.

The diagnosis is made clinically and with a special test called corneal topography, which maps out the altered shape of the cornea and allows for planning of the treatment. Initially the treatment is usually with glasses. In some patients the condition progresses and they will need to use contact lenses.

In a small percentage of patients, surgery may be required if the condition worsens. Recent surgical advances in the treatment of this condition have shown good results with the use of Intrastromal Corneal Rings, Partial-Thickness Corneal Transplant (Deep Lamellar Keratoplasty) or the standard Full-Thickness Corneal Transplant.
Regular eye checks are required to ensure the patient has optimal vision.