It's referred to as photo-pattern sensitivity, pattern sensitivity or a form of photosensitivity. I have it too. Fluorescents drive me a little batty after a while. My neurologist says it's fairly common in epileptics and affects about 5% of the general population. You can buy switches for fluorescents that keep them from flickering (not sure of the exact technology there), but they are very pricey (as in hundreds). I find that it's worse if the flourescent's the only light in the room. If there's a bit of sunshine coming in the windows, it's not nearly so bad.