As based on clinical studies of arteritic
and nonarteritic anterior ION, optic disc swelling regresses over an 8- to 12-week period, leaving a pale optic nerve (eg, optic atrophy).
EXCLUSION CRITERIA: Arteritic
, transient ischaemia and with a Central retinal artery occlusion preserved cilioretinal vessel.
On closer questioning, I realised that she had several symptoms, which suggested that this might have been arteritic
Incidence of nonarteritic and arteritic
anterior ischemic optic neuropathy: population-based study in the State of Missouri and Los Angeles County, California.
Optic disc cupping in arteritic
AION resembles glaucomatous cupping.
a Idiopathic intracranial hypertension (pseudotumour cerebri) b Intracranial tumour c Arteritic
ischaemic optic neuropathy d Optic neuritis 06 Which one of the following options is NOT likely to be observed in conjunction with the given history and the fundus photograph shown in Image B?
6 21 (R P) 22 (R P) TBM = Tubercular meningitis, ON = Optic neuritis, NAION = Non arteritic
ischemic Optic neuropathy, CRAO = Central retinal artery occlusion, RP = Retinitis pigmentosa PL = Perception of light, NPL = No perception of light Chart 1: BCVA distribution in cases and control BCVA distribution in Groups Cases Controls PL/NPL 7 7 20/20000-20/500 6 5 >20/500 9 8 Note: Table made from bar graph.
Generally AION is categorised as either arteritic
(AAION) or non-arteritic
occlusion of these vessels can result in blindness.
Similarly, transient visual obscurations are a feature in papilloedema and arteritic
anterior ischaemic optic neuropathy (AION), whereas in non-arteritic
AION there are generally no preceding visual symptoms.