[Many years of personal observation on the effect of timolol for arresting development of keratoconus]

On examining about 300 patients with keratoconus in the period of 20 years the authors detected in a number of cases variations of the intraocular pressure. By means of a pneumo-tonometer Digilab 30R periodic variations of the IOP were measured in 76 patients and daily variations in 42. The statistical analysis showed that the application of Timolol and reduction of the IOP variations has a decisive influence on the improvement of objective changes and the visual acuity without correction. Presently in our Department Timolol is used successfully in 160 patients. There was no deterioration in either patient at that time and many patients showed an improvement of the condition of keratoconus.