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
β-blockers act in glaucoma by - 
Select and explain. 
A. Increased aqueous outflow, B. Decreased aqueous production, C. Reduce vitreous volume, D. None
B: Decreased aqueous production
Answer: B: Decreased aqueous production 
Explanation: None