Thank you all for the support and understanding. No change since yesterday but that is a good thing...at least the Sx haven't become worse.

It probably isn't pollution caused as my area has had rain for a few days which helps to make the air pretty clean. Even so I do use Real tears on daily basis because of dry eye syndrome...and yes that does help to keep the vision as good as it can be most of the time.
This current eye situation seems to be a problem with focus so I think that maybe it is due to muscle spasm of the muscles that operate the lenses, or the ones that move the eyes. There's just a bit of pain in the left one so I don't think that it is a return of ON at this point.

I've had a mild fever overnight, so maybe it is a virus or infection of some sort that's causing problems. Do any of you experience symptoms of MS getting worse when you have an infection?

I was still kept awake in the night last night but was able to cat nap a bit yesterday during the day. Will try napping again today and tomorrow (have booked off work), and go from there.