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': 'Which of the following best defines the "Saccade": \nSelect and explain. \nA. Voluntary slow eye movements, B. Involuntary slow eye movement, C. Abrupt, involuntary slow eye movements, D. Abrupt, involuntary rapid eye movements', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Abrupt, involuntary rapid eye movements', 'role': 'assistant'}]