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
In papilledema, all the following are true except - 
Select and explain. 
A. Blurring of the disc, B. Congestion of retinal veins, C. Soft white exudates around the disc, D. Sudden loss of vision
D: Sudden loss of vision
Answer: D: Sudden loss of vision 
Explanation: Visual acuity and pupillary reactions usually remain fairly normal until late stages when optic atrophy sets. Even then, there is gradually progressive painless loss of vision.