[Keratoconus. II. Coexisting diseases and theories on its etiology and pathogenesis]

Data from 100 enquiries on the keratoconus are discussed. Bronchial asthma and genetic diseases of allergic origin have been revealed in 36% of patients, neurological disorders in 60%, hormonal disorders in 13%, habitual rubbing of the eyes in 40%, autographism in 58%. An influence on the development of keratoconus may have vasomotor disturbances and other factors, for example extended wearing of contact lenses causing periodical increases of the intraocular pressure in patients with a weaked central corneal area.