Endoscopic cyclophotocoagulation vs the Ahmed drainage implantChange in visual acuity (logMAR) ‐ 12 months (negative is better) · adults with refractory glaucoma1 finding from 1 reviewCyclodestructive procedures for refractory glaucoma 2019 · Cochrane Headline outcomes onlyno estimate extracted1 study · 54 participantsVery low