Keratoconus is a disorder (often hereditary) of the cornea in which an abnormality arises in the support tissue (collagen).
The disorder usually occurs on both sides, but often not to the same extent. The abnormality occurs more in men than women and usually from the age of twenty onwards. The progressive thinning of the cornea causes bulging resulting in irregular astigmatism and increasing myopia.
In the first instance this disorder can be rectified using corrective glasses or semi-hard or hard contact lenses. If the abnormality develops further, the only treatment available at present is a cornea transplant.
Recently, new technology has been unveiled which can stop the increasing thinning of the cornea: “ultraviolet crosslink” and a method for normalising the cornea: “intracorneal rings”.