I'm not a low-vision user, so I don't know how useful this is, but ...
Chrome has a free plugin called ChromeVis for low-vision users. It's
available on the Web Store. Your client might have better luck with it
than with ZoomText.
VICUG-L is the Visually Impaired Computer User Group List.
Archived on the World Wide Web at
http://listserv.icors.org/archives/vicug-l.html
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