In this segment of the 2013 Neuro-Ophthalmology Subspecialty Day series on recognizing distinctive neuro-ophthalmic symptoms, signs, and tests, Raghu Mudumbai presents to panelists Anthony Arnold, Lanning Kline, Mark Kupersmith, and Valerie Purvin the case of a 29-year-old man who recently noted trouble focusing and a change in his appearance.