Why is flicker frequency important?
If any portion of a web page flickers between 4 and 59 frames per second the possibility exists of causing some individuals with photosensitive epilepsy to have a seizure triggered by the flicker, flash, or blink, particularly if the flash has a high intensity and is within certain frequency ranges. Since the rates of many animations depend on the speed of the computer and the severity of the effects, your safest way of approaching this topic is to avoid using any animations or flickering completely. The most common flicker problems include: • Animated clip art and pictures • Blinking text • Scripted image effects For a detailed explanation and a example on how to fix these problems, see checkpoint J.
