I have this condition called visual snow syndrome, a neurological condition which causes my tinnitus. Symptoms are always there, but luckily, mine are mild. The tinnitus is the most noticeable though unless I'm listening to music.
The MRI found absolutely nothing. My eye doctor says my eyes are extremely healthy.
My symptoms line up exactly with VSS and I had a lot of peace of mind knowing what I was experiencing and that I wasn't going blind, so I didn't pursue the proper further test (PET scan, I think).
Honestly, the peace of mind was worth it, but be armed with research on it.
There are some treatments for both symptoms. The ones I've tried involve listening or looking at static. Neither had much effect on me.
The best way I've found to deal with it is to ignore it. focusing on treatments preversly makes me more aware of the annoyance.
In turn, that condition is commonly caused by the underlying metabolic problems, which can be caused by genetic mutations in mitochondria, toxins, episodes of hypoxia, unhealthy lifestyles, oxidative stress.
When this happens, the other symptoms may include chronic fatigue, acquired insulin resistance, T2DM, sometimes various neurological manifestations in different parts of the body, and even dementia. Personal mileage may vary, it really goes from 1 to 11.
Apparently a healthy number is 500+, most people will present with issues in the 250-300 range, and I was at 166 when critical is 144ish.
I have to take a daily pill for the rest of my life and things have improved, but the VSS is still the same.
For a long time we believed that when neurons die the condition stays forever and cannot be improved.
However the consequent observations on WW2 veterans proved the opposite - neuro tissues do recover but they do so extremely slowly.
If you had such a good response to B12 means that not all is lost.
What you can try to achieve is to provide the conditions for faster neurological recovery: speed-up the cellular ATP production to provide the energy for anabolism while slightly suppressing the immune system response so it does not get in the way. You biological machinery will do the rest.
The first part of the equation is reached with specific combinations of vitamins and coenzymes. For example, here is a combination that can serve as the basis: B1 in therapeutical doses (pills, >= 250 mg per day) + multivitamin. The second part of the equation is reached with NSAIDs.
Such treatment may allow you to reach some notable improvements just in few months. And those improvements will persist and accumulate.
There are various possible causes for acquiring a mitochondrial dysfunction beyond the malnutrition. The good news is that it can treated if it is not caused by a genetic defect.
The treatment is similar to treating Beriberi, regardless of the original cause. The unpleasant part is that it takes some time and patience ranging from months to years.