Originally posted by: MrWizzard
You might be susceptible to some kind of seizures; this could be the early warning sign. Possibly the combination of the game/tv/and game machine, have you tried a completely different TV.
Your eyes and brain pick up flashes that you don't consciously detect.
I am not saying you are going to have a seizure but try a different TV, and see what happens.
Try different viewing distances too.
EDIT: OPPS I just realized you could be talking about the computer version. In that case try changing monitors or refresh rate, also viewing distance.