Cheers for all the advice. Here are the answers. I appreciate everyones feedback and will give some a try. If you think of anything else do let me know.

I am running twin white lights think they were 55's so will try upgrading to 90's.
It might also be the visor, good shout as never thought of that.
My eyes are spot on as I used to wear glasses but had the op a few years back and have regular eye tests.
I doubt it is the bearings or setup as day riding is fine.
Pressures are what they normally are.
Tyres are only 1.5 yrs old.