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': 'All the following are true about Papilledema except \nSelect and explain. \nA. It is a purely non-inflammatory phenomenon, B. Transient loss of vision occurs, C. First sign is blurring of the nasal side of the optic disc, D. Sudden loss of vision with painful eye movement', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Painful eye movements and sudden loss of vision In papilloedema there is painless gradually progressive loss of vision which is usually bilateralQ which occurs after a long time only when optic atrophy sets in. In contrast, in papillitis there is LK sudden & marked painful loss of vision with ocular tenderness at inseion of MR & SRQ (medial & superior rectus), which is accompanied by pain on ocular movements, pulfrich phenomenon & RAPD Q.', 'role': 'assistant'}]