Glossary » seizure disorder
in some types of epilepsy, a seizure can result from the presentation of a rapidly-varying stimulus, such as flashing lights and repetitive sounds. Thus, interfaces should avoid strobe effects, blinking effects, and repetitive noises. In most interfaces, these are likely to annoy almost any user, but in the instances when such effects may be appropriate or useful to the target users, a warning should be provided, along with a way to disable the feature. The exact conditions that trigger seizure may vary, so it’s even better to provide ways to disable all repeating audio or animation or to control the speed of the animations.