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': 'Acute Papilloedema present with all except-a) Post neuritic atrophy b)  Increase blind spotc) Severe loss of vision d) Hyperemic field \nSelect and explain. \nA. a, B. bc, C. ad, D. ac', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vision loss occurs in long standing papilloedema (not in acute pappiloedema), and that occurs in less than 25% of patients.\nPost neuritic atrophy also occurs in long standing papilloedema and not acute papilloedema.', 'role': 'assistant'}]