(Iliff, 1944;Berson et al., 1966; Welsh, 1969;and Luntz, 1965 (Luntz, 1965), trabeculectomy has the advantage of fewer postoperative complications.
Materials and methodsA total of 34 patients-22 males and 12 femalestheir ages ranging from 35 to 75, had surgical treatment. There were 49 eyes on which 61 trabeculectomies were performed. All the patients were seen at the Glaucoma Clinic, St. John Eye Hospital, Baragwanath, and underwent trabeculectomy between 1 January 1974 and 31 December 1975. In all these patients medical treatment failed to control their glaucoma. Failure was judged by con-