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': 'Periphery of retina is visualized by: \nSelect and explain. \nA. Indirect ophthalmoscopy, B. Direct ophthalmoscopy, C. Goniocopy, D. Contact lens', 'role': 'user'}, {'content': "Answer: A \nExplanation: A i.e. Indirect opthalmoscopy - Area of retina visualized by direct ophthalmoscopy is 2disc dioptersQ and by indirect ophthalmoscopy is 8 DD. Peripheral retina is visualized by indirect opthalmoscopy Q and biomicroscopy examination by Goldmann's three mirror contact lens.Q", 'role': 'assistant'}]