RE: Checkpoint 2.3 Avoid causing the screen to flicker.

• From: Jason White <jasonw@ariel.ucs.unimelb.edu.au>
• Date: Sat, 21 Dec 2002 10:39:27 +1100
• To: Web Content Guidelines <w3c-wai-gl@w3.org>
• Message-ID: <15875.43567.945725.343540@jdc.local>

Lee Roberts writes:
 > 
 > Photosensitivity actually has a range of 2Hz to 63Hz.  However, the 
 > majority of standards states the recommendation is 2Hz to 60Hz.

Are these North American or international standards? According to
Gregg (when this topic was last discussed), 50 hz is the frequency of
AC power supplies in Europe, and it would be pointless and impractical
to specify an upper threshold in excess of this value. At least, that
was the argument.

Received on Friday, 20 December 2002 18:39:35 UTC