I just finished reading a couple of online articles about optic neuritis (Wikipedia and eMedicine, I think), and I saw that a relatively uncommon origin is from a sinus infection. I've had eye pain, and I've had sinus issues, but I've not observed any correlation. I'll keep an eye out in case I do.
Hi JJJ,
i have no experience with ON - at least nothing that has bothered me or found by my doctor with routine checkup. I can't answer your question - hopefully someone else here can provide some clues.
you're welcome,
Lulu