The goal of this clinical trial is to determine if the intraoperative application of Mitomycin-C can enhance the outcomes of Ahmed Glaucoma Valve (AGV) implantation in treating refractory glaucoma. This study is conducted among adult patients diagnosed with refractory glaucoma, a condition characterized by uncontrolled intraocular pressure despite the use of maximum tolerated medical therapy and previous surgical interventions. The main questions it aims to answer are: Does intraoperative Mitomycin-C reduce postoperative intraocular pressure more effectively than surgery without it? Does Mitomycin-C reduce the occurrence of postoperative complications such as hypertensive phases? Researchers will compare the experimental group receiving Mitomycin-C during AGV implantation to the control group undergoing AGV implantation without Mitomycin-C to see if the treatment leads to lower intraocular pressure and fewer surgical complications. Participants will: * Undergo baseline assessment including eye examination and measurement of intraocular pressure. * Be randomly assigned to receive either the Mitomycin-C treatment or no intervention during their scheduled AGV implantation surgery. * Attend follow-up visits at 1 week, 1 month, 3 months, 6 months, and 12 months post-surgery to assess intraocular pressure, visual acuity, and any postoperative complications.
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Change in Intraocular Pressure assessed using the Goldmann applanation tonometer
Timeframe: Baseline to 1-year follow-up visit