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': 'False about asteroid hyalosis \nSelect and explain. \nA. Calcium bodies in vitreous cavity, B. Degenerative condition of the eye, C. Usually bilateral, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Asteroid hyalosis is usually unilateral.', 'role': 'assistant'}]