Hi I have difficulty as noted earlier walking (and breathing) in pink/red lighting situations. Blue glasses are an asset. I have been tested for the flicker response (EEG) and I have no response to the flicker while wearing the blue glasses. If I do recall correctly the EEG is done with flicker rate ranging from 1 "blink" per second to 21 "blinks" per second with most epileptics who respond having a change in brain waves at 10 blinks/sec and seizure at about 17 blinks/second. Not all epileptics respond to the "blink" however. My response was not the exagerated movement without the glasses, but rather at 10 blinks per second I went into a sort of fetal position with no movement. MDs offered no explanation whatsoever. They also offer no explanation whatsoever about the effect of the blueglasses. Rita