Photosensitive epilepsy (PSE) is a form of epilepsy in which the patient is very sensitive to various visual stimuli such as moving patterns, blinking backgrounds, and flashing lights; in extreme circumstances, any of them can cause seizures. As you see, the list of stimuli includes some elements that can be seen in modern video games; the game screen flashes all the time when a dynamic scene is displaying. There are a lot of flares, explosions, flickering particles, blinking text alerts, backgrounds with regular patterns of texture moving quickly, and so on. This is why some game situations of poor conditions—depends on the time spent during the game session, lighting conditions, distance to the screen, sleep deprivation, emotional state, hunger, thirst, and many more—can cause a seizure. For such cases, there is a special term called Video game-induced seizures (VGS).
According to the article Stimulus Overload written by Joshua Cox (NREMT-P) and Eric T. Richardson...