Hello again, sorry to hear you're still having problems. A neurologist is good, but the only reason I mentioned an ophthalmic surgeon, is because they get so many people going to see them with their first episode of migraine. They get very good at knowing what's going on.
Although some senior doctors might order an MRI and look further themselves, others will often refer to a neurologist anyway.
Some people have visual disturbances lasting for weeks. They often become 'diluted' so that they are little more than a slight nuisance. An example might be that you have not been thinking about it while looking round at general scenery, but then you look at a face. The eyes seem normal but the mouth could be anything from vague to blotted out completely.
It has occurred to me that while the brain can often fill out missing areas, faces are a much more 'labor intensive' area for the brain. It is an image formed in circuits that cannot be fooled. The danger is, that the filled out areas may not contain vital information, like a car approaching from a certain point. Take care to be completely well again before driving.
Someone I know spent 18 months trailing from one specialist to another, checked for MS etc etc.. While out with them they would spend time covering one eye and or staring at my face...whatever, they were totally taken over by the symptoms. Despite this, they had the good fortune to get a good job and the change in lifestyle transformed them. A while later, they commented that their eyesight had never been better.
Good luck, and do keep us posted.