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
All the following are true about Papilledema except 
Select and explain. 
A. 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
D: Sudden loss of vision with painful eye movement
Answer: D: Sudden loss of vision with painful eye movement 
Explanation: 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.