Abstract: Objective To evaluate the efficacy of Ahmed FP-7 implantation in refractory glaucoma. Design Retrospective case series. Participants 45 cases (46 eyes) of refractory glaucoma in the 2nd Affiliated Hospital of Harbin Medical University. Methods Ahmed FP-7 glaucoma valve implantations were performed in all patients, and mean follow-up was 10.7±7.3 months. Main Outcome Measures Intraocular pressure (IOP), visual acuity, and postoperative complications. Results The cumulative probability of success (IOP≤ 21 mm Hg without antiglaucoma medications) was 79.8% and 74.1 % at 12 and 18 months, respectively. IOP was reduced from a mean of 45.8±12.1 mm Hg to17.3±5.5 mm Hg at 12 months and 17.6±5.3 mm Hg at 18 months (P<0.001). Visual acuity improved in 9 eyes, and no change in 35 eyes. The major postoperative complications including filtering bleb fiber encapsulation (19.6%), choroidal detachment (13.0%), hyphema (10.9%), drainage tube exposure (4.3%). Conclusion Ahmed FP-7 implantations in refractory glaucoma can control IOP in 75% of patients during 18 months follow-up. (Ophthalmol CHN, 2013, 22: 253-256)

Key words:  Ahmed drainage valve, refractory glaucoma; , complications