I cross my eyes like I'm trying to see a Magic Eye picture in reverse. Then I just look for things that appear to not be "quite right". I find it works quite well! Am on level 4 now I think!
(, Wed 3 Dec 2008, 16:34, Reply)
That doesn't work with the hand level, where things are mirrored!
(, Wed 3 Dec 2008, 16:36, Reply)