Optic disc drusen

A 35-year-old female presented with transient visual obscurations (TVOs) in the left eye (OS) that lasted 5–15 seconds at a time. Her symptoms began three months ago and occurred approximately every three weeks. They were triggered by stress and fatigue, but resolved with rest. She denied any headaches or diplopia. The rest of her past medical, surgical, social, and family histories were non-contributory. There was no prior history of migraine. On examination the best-corrected visual acuity was 20/25 in both eyes (OU). Pupils measured 5 mm in the dark OU, 3 mm in the light OU, with a relative afferent pupillary defect measuring 0.3 log units OS. Color vision test with Ishihara color plates was 14 out of 14 plates OU. Extraocular motility was full. Intraocular pressure measurements and slit lamp examination were within normal limits. Dilated funduscopic examination was normal except for the optic discs OU as shown in Fig. 4.1. The automated perimetry (Humphrey 24-2) is shown in Fig. 4.2.