A 45-year-old man with known hypertension presented with double vision ongoing for several weeks. He described seeing objects as if they were stacked on top of each other. This double vision disappeared when he closed either eye. He denied any diurnal variation of his symptoms and any associated limb weakness. He denied any history of dysphagia and dysarthria. He denied any history of thyroid disease. He did report intermittent numbness on the left side of his tongue.