Sorry but I have little knowledge of VEPs. Anyone else able to help?
This website might help you work out your result. If you look at the section:
Visually evoked potentials: when are they clinically useful?"
My extremely amateur interpretation is that your VEP is saying there is an abnormality that could 'possibly' have been caused by something like the demyelination / optic neuritis. I stress that this is an amateur interpretation though.