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
Tubular vision seen in - 
Select and explain. 
A. Myopia, B. Hypermetropia, C. Presbyopia, D. Optic neuritis
A: Myopia
Answer: A: Myopia 
Explanation: Ans. is 'a' i.e., Myopia Causes of Tubular vision Retinitis pigmentosa High Myopia Primary open angle glaucoma CRAO with sparing of cilioretinal aery