This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Ophthalmology
[{'content': 'Keratometry is done to assess: \nSelect and explain. \nA. Corneal sensation, B. Corneal endothelium, C. Corneal thickness, D. Curvature of cornea', 'role': 'user'}, {'content': "Answer: D \nExplanation: Keratometry measures the curvature of cornea e.g. Placido's disc, Orb Scan, Pentacam Placido's Disc Aesthesiometer is used to measure corneal sensation Specular microscopy is used for corneal endothelium - count and morphology of endothelial cells Pachymeter is used for measuring corneal thickness.", 'role': 'assistant'}]