Case ReportsPosttraumatic Emphysema of the Optic Nerve SheathRai, Ravneet S. B.Sc.; Rowlands, Megan A. M.D., MPH; Kally, Peter M. M.D.; Warren, Floyd M.D. Author Information Department of Ophthalmology, New York University School of Medicine, New York, New York, U.S.A. Accepted for publication December 12, 2018. The authors have no financial or conflicts of interest to disclose. Address correspondence and reprint requests to Ravneet Rai, B.Sc., Department of Ophthalmology, New York University School of Medicine, New York, NY. E-mail: [email protected] Ophthalmic Plastic and Reconstructive Surgery: March/April 2019 - Volume 35 - Issue 2 - p e43-e45 doi: 10.1097/IOP.0000000000001312 Buy Metrics AbstractIn Brief The authors describe the case of a 19-year-old female who suffered posttraumatic emphysema of the optic nerve sheath. She suffered massive head trauma requiring emergent neurosurgery and was incidentally found to have air in her optic nerve sheath on CT scan. At 6 weeks follow up, her visual acuity (20/25 uncorrected) and color perception in the affected eye were excellent. Her examination was notable for an afferent pupillary defect, mild disc pallor, and optic nerve atrophy on optical coherence tomography. This is a case of a patient with posttraumatic optic nerve sheath emphysema who recovered excellent visual function and received follow-up ophthalmic imaging. This report describes a unique case of optic nerve sheath pneumatization following severe head trauma and the structural and functional ocular sequelae that resulted from this injury. © 2019 The American Society of Ophthalmic Plastic and Reconstructive Surgery, Inc.