Are PHOMS a clinical sign of optic neuritis?

Our results show that PHOMS is not a common sign of optic neuritis. We didn't observe any case of PHOMS in the absence of optic nerve head oedema in eyes with optic neuritis. PHOMS seem to be a rare sign of optic neuritis associated to optic nerve head oedema, and they tend to disappear with the improvement of the optic nerve head oedema. We suggest that the presence of PHOMS in optic neuritis eyes with no optic nerve oedema should be a considered warning sign.