Adolescent Male With Vision Loss and Headache

A bulging of the optic disc is noted (see arrow). In addition, the optic nerve sheath is widened. It was measured at 5.2 mm (measurement not shown), with the upper limit of normal for a child being 4.5 mm.¹ (There is an association between widening of the optic nerve sheath [measured 3 mm posterior to the retina] and increased intracranial pressure.)

Normal: Measurement of a normal optic nerve sheath, as well as identification of the anterior chamber, lens, and posterior chamber. Used with permission of Seth R. Podolsky, MD, MS, Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY.