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PURPOSE: Whereas achieving intraocular pressure (IOP) targets ≤10 mm Hg typically requires surgical intervention, we sought to examine the safety and efficacy of trabeculectomy in normal-tension glaucoma (NTG). METHODS: Patients with progressive NTG undergoing trabeculectomy with preoperative IOP≤15 mm Hg during the 12-month period before surgery were identified at a single academic institution. Failure was defined as IOP reduction <20% below baseline (criteria A), <30% (criteria B), or <40% (criteria C), reoperation for glaucoma, or loss of light perception vision. RESULTS: Thirty eyes of 28 patients (mean age, 73±8.7 y) were enrolled with a mean follow-up period of 50±31 months. Mean postoperative IOP (8.6±2.9 mm Hg) and medications (0.6±1.0) at final follow-up was significantly (P<0.001) reduced compared with before surgery (13.2±1.4 mm Hg and 2.5±1.2, respectively). The cumulative probability of failure during 5 years of follow-up was 32% (criteria A), 48%, (criteria B), and 67% (criteria C). The probability of successfully achieving an IOP goal ≤10 mm Hg was 68% at 4 years of follow-up. CONCLUSIONS: Trabeculectomy is a safe and effective method for achieving single-digit IOP targets in NTG eyes with progression at low IOP.
Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL.
Full article9.2.4 Normal pressure glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
6.20 Progression (Part of: 6 Clinical examination methods)
12.8.1 Without tube implant (Part of: 12 Surgical treatment > 12.8 Filtering surgery)