The actual incidence of KC is not known. It is not a common eye disease, but it is by no means rare. It has been estimated to occur in 1 out of every 2,000 persons in the general population. Keratoconus is generally first diagnosed in young people at puberty or in their late teen’s, generally from 12 – 25.
It is found in all parts of the United States and the rest of the world. It has no known significant geographic, cultural or social pattern.