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
[{'content': 'After blunt trauma to eye a patient develops circumcorneal congestion. The further test done is \nSelect and explain. \nA. Indirect Ophthalmoscopy, B. Perimetry, C. Intraocular pressure measurement, D. Slit lamp', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Blunt or penetrating ocular trauma leads to\xa0vision loss through glaucoma.\nThus, next step is to measure IOP', 'role': 'assistant'}]