I didn't find it easy to get a dx when I had "optic neuritis", and it took a long time. First two didn't see anything wrong. Third one saw me after I'd had an abnormal MRI (scars in L. brain, opposite the affected eye) and had had Visual Evoked Response. I guess the third one had to accept that something was wrong. Later it got worse--visible sagging of lid, which he photographed, then it suddenly went away completely years later. I had double vision, pain when watching TV or movies, pain when moving eye too much.
Just saying that specialists don't always dx. Please don't ask why, but it is horribly frustrating to have double vision and have opthalmologists say I did not. I hope your condition is more easily diagnosed.
One of the things I've lived with since age 17 is that sometimes doctors claim I do not have the symptom I have. This is less common now that I am old and have other dx's as well. They believe