I hesitate to review a non-book book. Yet to experience a "magic eye" moment is surprisingly pleasant and revealing. Coming with a good dose of concentration fatigue and mental exhaustion, a realized autostereogram compensates all the frustration and irritation. As I try to divert my eyes while still observing the picture, I notice the changing of the pictures liking the shimmering of oil sleeks on the water. Yet the input is the same, yet the mind is working furiously trying to workout a representation. Until an unknown moment, something emerge in front of me, often sharper and crystalline, like the cone-shaped mount in the first page, in a glittering black/blue/gray coloring, replacing the flat pink streaks.
Nothing in my visual experience alerts me more of the unconscious workings of our visual cognitive process. The habitual "focusing" defeats the process. Except the first picture, I have more miss than hit for the rest of the book. Sometimes I see, but often I don't. There is no location or light or posture to give me clues of why the mysterious figures would choice to float up to my visual field.
Although autostereogram is an amusing visual trick, it serves a useful reminder of how little we know and control our own cognitive process. Even the old saying "the eyes see what the mind wants to see" is not entirely correct since the "want" implies attentional direction of our own mind.