Table 2.

Ophthalmologic tests to perform in case of suspected nutritional optic neuropathy.

Test
Colour vision tests (Ishihara plates, Panel 15D test)	Dyschromatopsia
VF	Central or cecocentral scotoma
VEP	Reduced amplitude, normal or near normal latency
RNFL OCT	RNFL thinning
ERG, OCT	To exclude retinal disease
MRI	To exclude compressive or demyelinating diseases

VF: Visual field; VEP: visual-evoked potentials; RNFL: retinal nerve fibre layer; OCT: optical coherence tomography; ERG: electroretinography.