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
All of the following are features of asteroid hyalosis except: 
Select and explain. 
A. Usually bilateral, B. Solid vitreous, C. Spherical calcium bodies, D. Usually asymptomatic
A: Usually bilateral
Answer: A: Usually bilateral 
Explanation: Ans. Usually bilateral