My potential ON was, in fact a hole in my retin which had detached. This was missed by the optician who suggested ON as I have MS and I accepted it. However after seeing an opthamologist as it was getting worse (the optician referred me for routine review), I had to have urgent surgery and am hoping my sight will return. The coincidences were amazing. Started on a massively hot day, symptoms similar etc etc. optician even dilated my pupil but missed it.
I didnt push or worry because I just assumed it was MS but it has highlighted that I do blame anything on MS and ignore it because I can’t do anything about it.
So please make sure you get checked out by a specialist as well just to be safe.