Anterior segment emergencies often present to the on-call ophthalmologist. These conditions are sight-threatening and require emergent recognition and treatment to preserve vision. This video series focuses on the presentation, pathogenesis, and initial care of common anterior segment emergencies that can present to any ophthalmologist, comprehensive or subspecialist. Emphasis is on anterior segment injuries including corneoscleral lacerations, traumatic hyphema, and chemical burns; severe microbial keratitis; corneal perforations; and acute angle-closure glaucoma. Learn to recognize common anterior segment emergency conditions, understand mechanisms of pathogenesis, provide emergent treatment, and prepare the patient for further treatment as needed.