This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
All of the following are features of asteroid hyalosis except 
Select and explain. 
A. Usually bilateral, B. Spherical calcium bodies, C. Solid vitreous, D. Usually asymptomatic
A: Usually bilateral
Answer: A: Usually bilateral 
Explanation: Asteroid hyalosis: It is characterised by small, white rounded bodies suspended in the vitreous gel. These are formed due to accumulation of calcium containing lipids. Asteroid hyalosis is a unilateral, asymptomatic condition usually seen in old patients with healthy vitreous. There is a genetic relationship between this condition, diabetes and hypercholesterolaemia. The genesis is unknown and there is no effective treatment. Ref:- A K KHURANA; pg num:-245