This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
[{'content': 'All of the following are causes of night blindness except \nSelect and explain. \nA. Oguchi, B. Vitamin A deficiency, C. High myopia, D. Devics disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Devics disease is optic neuritis with myelitis It is also called neuromyelitis optica Refer Khurana 6th edition page number 329', 'role': 'assistant'}]