Abstract
To describe a new technique and present its long-term outcome for prevention of Ahmed glaucoma valve (AGV) tube exposure in patients with refractory glaucoma. Twenty-seven eyes of 24 patients (mean age, 50 years; age range, 16-78 years; 8 females, 16 males) with refractory glaucoma who had the AGV implant were retrospectively reviewed. For AGV implantation, a long scleral flap combined with Tenon advancement and duplication was used. In this technique, a long scleral flap is created to completely cover the extraocular part of valve's tube, and the flap surface is covered with duplicated Tenon's tissue. The average follow-up after AGV implantation was 21.7 months (range, 12-36 months). The mean intraocular pressure before the operation, which was 44.1 mmHg (range, 26-62 mmHg), decreased to 14.2 mmHg (range, 8-20 mmHg) at the last follow-up visit, showing 67% reduction with AGV implantation. The mean number of antiglaucomatous medications was 4.1 before the AGV implantation and decreased to 0.9 after the operation, showing 88% reduction. In 14 eyes (51.9%), there was no change in the best corrected visual acuity (BCVA), and in 11 eyes (40.7%), the BCVA increased by 2 lines on the Snellen chart postoperatively. No patient develope...Continue Reading
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