Abstract Background: Detection of intracranial involvement in acute hypertension traditionally relies on fundoscopy, a method with limited applicability at the bedside. Ultrasonographic measurement of the optic nerve sheath diameter (ONSD) has emerged as a rapid, non-invasive alternative. Objective: To synthesize evidence on ONSD in adults and pregnant women with acute hypertensive states, assessing the difference in measurements between groups and its diagnostic performance for elevated intracranial pressure (ICP). Methods: Systematic review and meta-analysis following PRISMA guidelines. Three databases were searched […]