Flashing or Blinking Content

People with photosensitive seizure disorders can experience a seizure if web content flashes at them within specific parameters. This will be a problem only if all of the following are true:

1. The flashing occurs more than three times in any one second period;
2. the flash covers a sufficiently large area of the screen; and
3. the flash is bright enough.

What to do:

• Examine the screen display, looking for content that flashes or blinks more than three times in one second.
• If no content blinks or flashes at that rate, the page passes and nothing more is needed.
• If content DOES blink or flash at that rate, set your screen to 1024 x 768 and follow the checks below.

What to check for:

• Check that the flashing is smaller than a box that is one third the height and one fourth the width of the screen.
• If it is smaller than the box, the page passes this requirement and no further testing is needed.
• If the flashing is larger than the box, it may still pass but further testing is beyond the scope of EasyChecks. Use resources below if you wish to proceed further.

To learn more about flashing content

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