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Background: Intraocular pressure is the only modifiable risk factor for the development and progression of glaucoma. Raised intraocular pressure could cause progressive visual field loss and blindness if left uncontrolled. Adherence to ocular hypotensive medications is vital to prevent optic nerve damage and its consequences. This study was conducted to systematically summarize the magnitude of glaucoma medication adherence and factors influencing adherence to glaucoma medications among adult glaucoma patients in Ethiopia., Methods: Database searches to identify research articles were conducted on PubMed, EMBASE, Cochrane, AJOL, SCOPUS, and Google Scholar without restriction on the date of publication. Data extraction was done using a data extraction Excel sheet. Analysis was performed using STATA version 16. Heterogeneity was assessed using I2 statistics. Pooled prevalence and pooled odds ratio with a 95% confidence interval using a random effect model were computed., Result: We included six studies with a total of 2101 participants for meta-analysis. The magnitude of adherence to glaucoma medication was found to be 49.46% (95% CI [41.27-57.66]). Urban residents (OR = 1.89, 95% CI; 1.29-2.49) and those with normal visual acuity (OR = 2.82, 95% CI; 0.85-4.80) had higher odds of adherence to glaucoma medications. Patients who pay for the medications themselves (OR = 0.22, 95% CI; 0.09-0.34) were found to have 78% lower odds of adherence than their counterparts., Conclusion: The magnitude of glaucoma medication adherence is lower than expected. Place of residence, visual acuity, and payment means had statistically significant associations with glaucoma medication adherence. Tailored health education on medication adherence and subsidization of glaucoma medication is recommended., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Abore et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)