very interesting. I agree with your ophthalmologist, this sounds neurological. A tumor is possible. If the neurologist read/heard your history and decided that Jan 4th was soon enough, then it probably is.
I tro have wierd eye problems, dark flashes for 3 years, and my eyes are totally healthly according to the opth. I had some dizziness this weekend and went to ER for a CT scan, ruled out tumor which had been nagging at my nerves. I would recommend finding another neuro to have a neuro exam sooner than later. I was able to schedule 2 appts with new neuros for next week and I live in a small area. There should be somenone who can see you. I am having an MRI this morning, my 3rd in 3 years, as MS has been suspicious. There is a great doc on this site who I am sure will respond to you. Best of luck...
I would say you might also try a neuro-ophttohalmologist. They're aren't that many around, but usually they can relate better to visual disturbances. They can also do all the viusual field tests, and order the CT, MRI, etc.. DrThomas Mizen here in Chicago could give you a recommendation to someone in your area of the U.S..