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': 'Amplitude of accommodative convergence is: \nSelect and explain. \nA. Altered by weak cycloplegics, B. Altered by lenses and prisms, C. Decreased in older people, D. Altered by ohoptics', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Altered by weak cycloplegics', 'role': 'assistant'}]