As far as I know most time dizzy is from medications like a side affect when on meds . Being dizzy isnt a t.n. symptom in most of the people I have talked with neither is eye sight decreasing .... A few thing you mentioned do seem like t.n. but others dont .
I would try to get apt with neuro and have request to have a current MRI done it has been what 6 years since your last one...2005 ??
hope your weekend has been going well for you.
Low pain and positive energy to you.
PEACE
BMW