Trabeculectomy: A retrospective study of results of long-term follow-up. Our experience on 198 eyes

We examined 169 patients (198 eyes) who underwent trabeculectomy between 1987 and the end of June of 1993 at the University Eye Clinic in Ferrara (minimum follow-up: six months) suffering from chronic open-angle, chronic angle-closure and acute glaucomas. The authors consider the results for each type of glaucoma during a three-year follow-up; based on the controlled cases with and without additional medication and based on uncontrolled cases; through the short-and long-term complications and their effect on the pressure compensation; through the post-surgery pressure levels, studying the relationship between age and post-operative outcome. The efficacy of trabeculectomy is confirmed in this study: the intraocular pressure is normalized (<21 mmHg) in 90.4% of cases. In general the complications (39.9%) did not affect the post-operative results. The better results are observed in patients over 60 years old with open-angle glaucoma.