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Blinking images and Checkpoint 7.1

From: Ken Reader <kreader@attaininc.org>
Date: Fri, 1 Feb 2002 09:41:09 -0500
Message-ID: <DF1E0454B385774FA500E4CD4089F4D3028931@attaininc.org>
To: "W3c-Wai-Ig (E-mail)" <w3c-wai-ig@w3.org>
I was led to believe that any animated image was not acceptable on a web
page because it might cause seizures in users with photosensitive
epilepsy.  So I have avoided using any animation and will not use it in
any website that I design.  My question is: If a website has a blinking
image is that website considered as not complying with the WAI
Checkpoint 7.1--
A flickering or flashing screen may cause seizures in users with
photosensitive epilepsy and content developers should thus avoid causing
the screen to flicker. Seizures can be triggered by flickering or
flashing in the 4 to 59 flashes per second (Hertz) range with a peak
sensitivity at 20 flashes per second as well as quick changes from dark
to light (like strobe lights).

Ken Reader
IT Coordinator
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Received on Friday, 1 February 2002 09:46:32 UTC

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