During this interactive video tutorial, Shaina M. Sullivan, OD educates on using OCT for assessing optic nerve edema. Through the review of Dr. Sullivan's compelling and moving cases, she demonstrates how to analyze optic nerve appearance in pediatric and adult patients, how to recognize the causes of optic nerve edema in pediatric versus adult patients, including life-threatening etiologies, how to differentiate papilledema from pseudopapilledema with OCT and demonstrates the utilization of an algorithm for evaluating and managing patients with suspected papilledema.