Could be neural noise
I have had tinnitus for years and developed 'visual snow' or 'persistant migraine aura' after a bad liver infection a couple of years ago. Mostly it's like watching a TV picture that needs tuning in a little bit better - like there's a net of tiny black dots in front of everything I look at - but I get flashes, floaters and larger black dots too. The dots turn green in the dark almost making me nightblind. I had a MRI scan to check it wasn't a brain tumour which was my first, hysterical conclusion. Apparently it is more common in people who have tinnitus and you get as good at tuning it out the way you can the squealing in your ears.
(Innogen, Sun 26 Jul 2009, 20:13, Reply)