That is the idea of the blip page, when you apply the same focus from the 3D stereograms on a book you see a blip page that's how you know you got it. Yes it really is easy to do with a book too, it's a relaxed gaze.
Thinking analyising it makes it hard.
Just use the technique for entering the Accelerative Learning state, say the affirmations, place the tangerine on the back of your head and with softened gaze allow yourself to see the blip page, say the chant while turning the pages and you got photofocus doing exactly what it is supposed to be doing for you.
Alex