PurposeThe purpose of this study is to report the effectiveness of trabeculectomies (TE) and modified deep sclerectomies (mdS) in a group of patients with juvenile uveitic secondary glaucoma.MethodsThis is a retrospective analysis of 16 TE and eight mdS.ResultsPostoperatively, an IOP reduction to 11.6 ± 4.7 mmHg was achieved in the TE group and to 18.5 ± 11.4 mmHg in the mdS group (p = 0.045). In the TE group, 14 patients showed postoperative success, one limited success and another was a failure compared to four successes and four failures in the mdS group (p = 0.041). The mean number of complications was 1.25 ± 1.49 in the TE group and 0.38 ± 0.74 after mdS (p = 0.11). In the mdS group, four patients (50%) needed additional glaucoma surgery compared to one TE patient (p = 0.023).ConclusionBoth surgical techniques showed a marked reduction of IOP. Trabeculectomy has a higher probability of achieving success and lowering IOP.