Yeah, I'm in Ireland, cold, dull, wet. I've noticed a massive improvement just from sitting out on a sunny day and eating Vit D foods. Huge improvement.

I've noticed loads of people with extended issues seem to be in cold weather countries, like Canada. I never hear of soccer players getting this, and they pick up a fair share of head knocks. I usually play, but just haven't been active this year. After a cold winter, I guess my vit D levels were really low and it made me susceptible to even a mild concussion (no LOC, no amnesia, basically got my bell rung).

I think the sitting in the dark waiting for PSC to pass is counter productive. I've been feeling pretty close to normal since I stopped doing just that.