Materials and Methods: Patients who had been applied trabeculectomy from April 1993 to September 2003 were reviewed retrospectively. Two hundred and fifty three eyes of 198 subjects who had at least 1 year follow up were included in the study. Twentyeight eyes of 28 subjects in which CD developed were named as Group 1 and the rest 225 eyes of 170 subjects were named as Group 2.

Results: In group 1, preoperative visual acuity was considerably less, cup/disc ratio was increased and the frequency of pseudoexfoliative glaucoma was high with respect to the control group. There were significant relations between the development of CD and preoperative findings such as narrowing of anterior chamber, hipotony, maculopathy of hipotony, hyphaema and fibrin reaction in the anterior chamber. In group 1, it is determined that CD is not the cause of permanent decrease in visual acuity. In the preoperative 1st day, 6th month and 1st year follow up, the decrease in IOP in CD group was statistically significant when compared to the control group.There was no significant difference between both groups according to the success of decreasing IOP under 18 mmHg.There was also no significant difference between the two groups when the number of glaucoma medications used in 6th month and 1st year are compared but in the 2nd year folllow up period it was higher in group 1.

Conclusion: Choroidal detachment which may occur after trabeculectomy has no permanent effect on visual acuity, long term success of trabeculectomy and IOP control. Keywords : Trabeculectomy, choroidal detachment, IOP control