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': 'Tubular vision seen in - \nSelect and explain. \nA. Myopia, B. Hypermetropia, C. Presbyopia, D. Optic neuritis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Myopia Causes of Tubular vision Retinitis pigmentosa High Myopia Primary open angle glaucoma CRAO with sparing of cilioretinal aery", 'role': 'assistant'}]