Edit: This is in reply to Komplicado. AlexK must have posted whilst I was typing.
--
That's what I originally thought until I saw the stereoreading page.
http://www.debateit.net/stereoreading/
Using this, the text is very sharp, as is the magic eye image behind it. This made me go back and reread the PR book and then I came across the aforementioned paragraph.
It certainly makes more sense to me that the subconscious could understand it better if it was in sharp focus. But then again, this is PR...
AJ
[This message has been edited by boomyboomy (edited February 08, 2003).]