This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'Increased episcleral venous pressure can: \nSelect and explain. \nA. Increase IOP, B. Decrease IOP, C. No effect on IOP, D. Initially increases then decreases IOP', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Increased episcleral venous pressure Increases IOP. Decreases drainage.', 'role': 'assistant'}]