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
False about asteroid hyalosis 
Select and explain. 
A. Calcium bodies in vitreous cavity, B. Degenerative condition of the eye, C. Usually bilateral, D. All of the above
C: Usually bilateral
Answer: C: Usually bilateral 
Explanation: Asteroid hyalosis is usually unilateral.