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. Perimetry, B. Direct ophthalmoscopy, C. Ultrasonography, D. Intraocular pressure measurement', 'role': 'user'}, {'content': 'Answer: D \nExplanation: As a result of the blunt trauma to the eye the antero-posterior diameter of the eye decreases and there is simultaneous expansion at the equatorial plane associated with a short lived increase in intraocular pressure.\nThis increase in IOP may cause globe rupture or other complications.\nThis pt has cirumcorneal congestion which is due to increase in IOP and thus the best investgation for him is option (D).', 'role': 'assistant'}]