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 child has got a congenital cataract in one eye involving the visual axis. When should the child be operated ? \nSelect and explain. \nA. Immediately, B. At 2 months of age, C. At 1 year of age when the globe becomes normal sized, D. After 4 years when entire ocular and orbital growth becomes normal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Presence of dense cataract present at bih is an indication for urgent surgical management to prevent amblyopia. Ref: CURRENT Diagnosis and Treatment: Surgery, 13th Edition, Chapter 37; Comprehensive Ophthalmology By AK Khurana, 4th Edition, Page 174.', 'role': 'assistant'}]