[Trabeculectomy. Long-term retrospective study].

Long term follow up of 51 eyes treated by trabeculectomy between 1975 and 1978. The pressure remains below 20 mmHg in 94% of our cases and progression field loss is stopped in 60%. The control of pressure needs adjunction of a medical treatment in 47% of cases. Progression of glaucomatous field loss is stopped when the ocular pressure is very low (40% or more of initial pressure). Cataract is seen in oldest patients. These observations suggest that: glaucoma surgery must give a sufficient drop of ocular pressure in all cases with pressure between 15 and 20 adjuvant medical therapy is useful old patients are a poor material for glaucoma surgery.