Yes Celiac disease can cause optic neuritis. Jimmy18 doesn't know what he's talking about.
Is It Possible To Have Optic Neuritis Due To Celiac Disease?
Celiac disease has no relation with optic neuritis. MS and optic neuritis are directly related. It is not necessary that you have brain lesions on MRI due to MS. Every time MRI scan can show different picture of MS with or without or new lesions. Optic neuritis is one of early symptom of MS.