Graft-free Ahmed tube insertion: a modified method at 5 mm from limbus

OBJECTIVE To determine the medium-term outcome of Ahmed implants inserted through a needle tract at 5 mm from limbus that eliminates the need for a donor scleral graft. METHODS A retrospective case series of 19 patients undergoing Ahmed implant surgery for refractory glaucoma with a mean follow-up of 12 months. Primary outcome measures included control of intraocular pressure after surgery. Secondary outcome measure included the frequency of intraoperative and postoperative complications. RESULTS Intraocular pressure was maintained between 6 and 21 mmHg throughout the study. There was no postoperative hypotony. There were no complications related to this modified technique. CONCLUSION Needle tract at 5 mm from limbus maintains implant's ability to control intraocular pressure and eliminates the need for a donor scleral graft or heterologous material.