A 71-year-old man presented to the emergency department at Tufts Medical Center after experiencing sudden painless loss of vision in his right eye for the past 48 hours.
For approximately 2 weeks before presentation, the patient had been noticing blurry vision and a sharp, intensely painful right-sided temple headache. The patient was examined by an optometrist several days before presentation, at which time he was documented to have intact visual acuity with normal-appearing anterior and posterior examinations.
At the time of presentation, the patient denied ocular pain, redness, discharge,