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retinoblastoma management. Routine clinical audit of retinoblastoma management can identify areas for clinical practice change. To evaluate the efficacy of pretreatment with topical betamethasone in Ahmed glaucoma valve (AGV) implantation. Randomized clinical trial. Sixty-two eyes from 62 patients undergoing AGV. We randomly assigned patients undergoing AGV to 2 arms of the study. The case group received AGV implantation with preoperative betamethasone eye drops, and the control group did not receive preoperative betamethasone. Follow-u