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': 'What is the investigation going on in Ophthalmology examination \nSelect and explain. \nA. Pachymetry, B. Tonometry, C. Biometry, D. LASER interferometry', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Goldmann Applanation tonometry Gold standard. Based on Imbe Fick law. If cornea is thinner than reading is falsely low. If cornea is thicker, it is falsely high. Applanation tonometry Other Options Pachymetry: Corneal thickness Biometry: Calculation of Power of IOL to be implanted after cataract surgery LASER interferometry: used to detect the maximum visual potential of the eye', 'role': 'assistant'}]