This classic poster by Rand—based on the cover of a book—creates a rudimentary sensation of depth as the black letters float in front of white ones. Why do we accept this illusion? Similar effects occur in our perception of the physical world, where our visual system assures us that partially hidden objects exist in their entirety. The brain reconnects the interrupted letters because their visible edges align.
This poster suggests an altered state of mind by filling John Lennon’s glasses with a swirling optical illusion. The photograph has been converted to a high-contrast image, a technique sometimes called "posterization."
Chermayeff’s famous poster uses a system of found typography to represent an international conference of designers.