Let us go to the important review of papilledema papillitis and RBN   Definition in papilledema swelling of on head due to increased intracranial pressure  in papillitis inflammation or infarction of on head in retrobulbar neuritis inflammation of orbital part of o nerve    Unilateral/bilateral papilledema bilateral  in papillitis  unilateral  in retrobulbar neuritis unilateral Vision impairment in papilledema enlargement of blind spot  in papillitis scotoma paracentral scotoma to complete blindness   in retrobulbar neuritis scotoma paracentral scotoma to complete blindness   Funduscopy in papilledema marked hyperaemia disc in papillitis  hyperaemic disc in retrobulbar neuritis normal disc    Vessel appearance in papilledema enlarged and tortuous veins  in papillitis enlarged vessels  in retrobulbar neuritis  normal vessels    Haemorrhages in papilledema  around disc and not periphery …