ABSTRACT Purpose: To compare the effect of Ginkgo Biloba extract (GBE) intake versus placebo as adjunctive therapy for normal tension glaucoma (NTG). Methods: PubMed, Cochrane, Embase and Web of Science databases were queried for randomized controlled trials (RCTs) and observational prospective or retrospective studies that compared GBE versus placebo in the settings of NTG. Outcomes included visual field mean deviation (MD), visual field pattern standard deviation (PSD), and adverse events. Heterogeneity was assessed using I2 statistics, and a random-effects model […]