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Keratoconus (from Greek: kerato- horn, cornea; and konos cone) is a degenerative disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve.
Keratoconus can cause distortion of vision, with multiple images, streaking and sensitivity to light all often reported by the patient.


It is typically diagnosed in adolescent years and attains its most severe state between the ages of 20 and 40. If afflicting both eyes, the deterioration in vision can affect the patient's ability to drive a car or read normal print.
In most cases, corrective lenses fitted by an optometrist are effective enough to allow the patient to continue to drive legally and function normally. Further progression of the disease may require surgery.

Keratoconus affects around one person in a thousand; difficulties with differential diagnosis cause uncertainty as to its prevalence. It seems to occur in all populations throughout the world, although more frequently in certain ethnic groups, such as South Asians. Environmental and genetic factors are considered possible causes, but the exact cause is uncertain. It has been associated with detrimental enzyme activity within the cornea, and is more common in patients with Down syndrome.

With the current treatment available most people should be able to lead a normal lifestyle.


A very informative group for people with the condition "The Keratoconus Group" can be found at