This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'A patient on amiodarone is diagnosed to have cornea verticillata. What should be management – \nSelect and explain. \nA. Stop the drug, B. Penetrating keratoplasty, C. Lamellar keratoplasty, D. Observation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cornea Verticillata\n\nThis is a whorl-like opacity in the corneal epithelium seen in patients on long-term treatment with medication such as amiodarone, chloroquine, phenothiazines and indomethacin.\nIt is also seen in patients with Fabry disease and its carrier state. The condition is generally asymptomatic, harmless and reversible on stopping the drug.\nThe whorl-like pattern shows the direction of migration of corneal epithelial cells. Occasionally the condition had been known to cause glare and surface discomfort which response to topical lubricants.', 'role': 'assistant'}]