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Re: text 'truncation' at normal scaling

From: Wayne Dick <waynedick@knowbility.org>
Date: Wed, 12 Nov 2014 22:06:11 -0800
Message-ID: <54644A53.8080103@knowbility.org>
To: James Nurthen <james@nurthen.com>, Adam Cooper <cooperad@bigpond.com>
CC: w3c-wai-ig@w3.org

It about time that we drop the myth that zoom constitutes reasonable 
accommodation.  There are so many things wrong with reading with zoom 
that it is hard to start enumerating them.  First there is retrace.  
People who read with screen magnification spend about 17 to 50 percent 
of read time involved in retrace.  Next there is the challenge to short 
term memory.  Thus reading with zoom is slower and much more error 
prone.  Finally there is the noise to signal ration.  On any given page 
only the line being read has any meaning, the rest of the page is 
disconnected noise.  Since most people with vision loss have difficulty 
distinguishing signal from noise this especially problematic.

Can some people read with zoom?  Sure, I can, and do when no other 
option is available. I have read amazingly difficult content with zoom, 
but the experience is profoundly distracting, and it is slow and ugly 
work.  You have to be very smart to succeed professionally with only 
zoom to help you, and you will never reach your intellectual potential.

Wayne Dick
Received on Thursday, 13 November 2014 06:06:40 UTC

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