The photosensitivity takes both eyes being used to take effect. It has to do with the optic nerve. Close one eye or use an eye patch and it could be alleviated. This is a pain in the butt though and is too annoying. I have photosensitive epilepsy and have the same problem with computer monitor flicker. About 3 % of persons with epilepsy experience this. Gee, my luck. I have gone the route (which is also cheaper) of using a video-out card and use a tv for a monitor to alleviate the flicker problem. Regular computer monitors will give me simple-partial seizures within five minutes of when I start using them.

This is not limited to just flourescent lights and computer monitors though. NBA basketball, 3D video game commercials on tv, backwards "spinning wheels" on people's cars nowadays. There are numerous things that trigger it for me.