Bilateral optic atrophy

摘要

A 34-year-old man presented initially with gastrointestinal symptoms and later developed neurological symptoms and signs (peripheral neuropathy and delirium) and alopecia. He was a strict vegetarian and took alcohol in moderation (50-100 mL per week). A photograph of his fundus is shown (Fig. 1). He later developed diminution of vision with visual field constriction and defective colour vision (Fig. 2).