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: Surgery
[{'content': 'Tonography is useful in: \nSelect and explain. \nA. Total facility of aqueous outflow, B. Reflecting the uveo scleral outflow of aqueous, C. Monitoring the IOP in different states, D. Detecting the formation of aqueous humour', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tonography - is a noninvasive technique for determining the facility of aqueous outflow Tonometry - is the assessment of the IOP of the eye and is one of the pillar stones of diagnosis of glaucoma', 'role': 'assistant'}]