Keratoconus has been estimated to occur in 1 out of every 2,000 persons in the general population. It is generally first diagnosed in young people at Keratoconus has been estimated to occur in 1 out of every 2,000 persons in the general population. It is generally first diagnosed in young people at … Keratoconus has been estimated to occur in 1 out of every 2,000 persons in the general population. It is generally first diagnosed in young people at …