The role of oral metformin in preventing and treating age-related macular degeneration: A meta-analysis.

Background: We aimed to perform a meta-analysis to evaluate the effect of metformin on age-related macular degeneration.

Methods: We searched the following databases: PubMed, Scopus, and Web of Science. We included any randomized control trials, prospective and retrospective cohorts, cross-sectional studies, and case-control studies that investigated the effect of metformin on age-related macular degeneration in our meta-analysis with no age or language restrictions.