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': 'Cupuliform cataract stas from \nSelect and explain. \nA. Posterior subcapsular region, B. Anterior capsule, C. Near nucleus, D. Annularly', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Posterior subcapsular regionCupulifurm senile coical cataract (Posterior subcapsular) : Here a saucer shaped opacity develops just below the capsule. Usually in the central pa of posterior coex (posterior subcapsular cataract), which gradually extend outwards.Cupuliform cataract lies right in the pathway ofthe axial rays and thus causes an early loss of visual acuity.', 'role': 'assistant'}]