Photosensitive epilepsy is a condition in which individuals experience seizures triggered by exposure to certain visual stimuli, such as flashing lights or rapidly changing visual patterns. While this condition is relatively rare, it can be triggered by a range of sources, including video games, television shows, and even websites.
One of the most infamous cases of photosensitive epilepsy occurred in Japan in 1997, when an episode of the popular TV show Pokemon caused hundreds of viewers to experience seizures. The episode, titled "Electric Soldier Porygon," contained flashing visual effects that were later determined to be the cause of the seizures. More than 700 children across Japan were taken by ambulance to hospitals as a result of this incident.
In response to this incident and others like it, the World Wide Web Consortium (W3C) have established guidelines for website designers to follow in order to minimize the risk of triggering seizures in users with photosensitive epilepsy. These guidelines ensure that any flashing elements on a website do not flash more than three times in any one-second period or the flash is below the general flash and red flash thresholds.
While photosensitive epilepsy remains a relatively rare condition, it is important for website designers to be aware of the risks and take steps to minimize the potential for harm. By following established guidelines and being mindful of the potential impact of visual elements on users, we can create a more inclusive online environment for all.
