Comparison of Repeat Trabeculectomy Versus Ahmed Valve Implantation After Initial Failed Trabeculectomy Surgery.

Prcis: Repeat trabeculectomy is associated with similar postoperative intraocular pressure (IOP), a lower complication rate, and a lower need for medications when compared with Ahmed valve implantation (AVI) when performed after initially failed trabeculectomy.

Objective: The goal of this study was to compare the efficacy of repeat trabeculectomies and AVI after an initial failed trabeculectomy.

Methods: All studies that investigated the postoperative success of patients who underwent AVI or repeat trabeculectomy with mitomycin- C after a prior failed trabeculectomy with mitomycin- C found in PubMed, Cochrane Library, Scopus, and CINAHL were included.