(j) SCREEN FLICKER
No flashing or blinking multimedia.
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.