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Updated: Oct 13, 2026

Trabeculotome Tunneling Trabeculoplasty (3T): A Step-by-Step Surgical Protocol for Primary Open-angle Glaucoma
Published on: May 29, 2026
Nonpenetrating deep sclerectomy versus trabeculectomy in bilateral primary open-angle glaucoma
F El Sayyad1, M Helal, H El-Kholify
1El-Maghraby Eye Hospital, Jeddah, Saudi Arabia.
Objective:
To establish the efficacy and safety of nonpenetrating deep sclerectomy versus trabeculectomy in primary open-angle glaucoma.
Design:
Prospective randomized trial.
Participants:
Thirty-nine patients (78 eyes) with bilateral primary open angle glaucoma were included in the study.
Intervention:
Eyes were randomly assigned to receive deep sclerectomy in one eye and trabeculectomy in the other eye.
Main Outcome Measures:
Mean intraocular pressure (IOP), postoperative medications, visual acuity, success rate, and complications.
Results:
At 12 months, mean IOP reduction was 12.3 +/- 4.2 (sclerectomy) versus 14.1 +/- 6.4 mmHg (trabeculectomy) (P = 0.15), and an IOP = 21 mmHg was achieved in 36 (92.3%) and 37 eyes (94.9%) (P = 0.9), respectively. Complications included three (7.7%) flat/shallow anterior chambers and one (2.6%) hypotony (trabeculectomy), whereas internal iris incarceration was encountered in two eyes (5.1%) (sclerectomy).
Conclusions:
Deep sclerectomy may provide comparable IOP reduction with fewer complications in management of primary open angle glaucoma.
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