checkbox No flashing or blinking multimedia.
checkbox No scrolling or blinking text.

Design pages to avoid causing the screen to flicker with a frequency greater than 2 Hz and lower than 55 Hz.

Uploaded multimedia should not cause the screen to flicker. Examples of multimedia to watch for screen flicker are:

  • Animated gifs
  • Flash files
  • DHTML-enabled Websites
  • or other dynamic content.

Why do this? Some individuals with photosensitive epilepsy can have a seizure triggered by displays that flicker, flash, or blink. Also, scrolling or blinking text can be very hard for people with visual impairments to read.

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