Papilloedema is characterised by all of the following EXCEPT-: (A) Loss of retinal venous pulsations, (B) Transient obscurations of vision, (C) Sudden painless loss of vision, (D) Disc oedema
Answer is C. Vision loss occurs in long standing papilloedema (not in acute pappiloedema), and that occurs in less than 25% of patients.
Post neuritic atrophy also occurs in long standing papilloedema and not acute papilloedema.