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Kaplan–Meier curves showing the probabilities of surgical success versus months of follow-up. The Logrank statistical test was used. Eyes were classified as failures if IOP decreased >20% from baseline or the absolute IOP was <21 mm Hg. The solid line and dashed line represent patients treated with gonioscopy-assisted transluminal trabeculotomy (GATT) and trabeculectomy (TRAB), respectively
