Illusion Cards by Y and B Associates Inc.

Effect: Vintage double-decks set of Can You Believe Your Eyes? Illusions & Visual Oddities Y & B Associates novelty educational as well as entertainment playing cards set in original box, designed by Dr. J. R. Block and Dr. Harold E. Yuker, Professors of Psychology, Hofstra University, Hempstead, N.Y.

Set consists of two (2) decks of playing cards containing over 100 illusions and visual oddities, with the plan of the deck being as follows:

• Aces: Illusions in Color
• Kings: Color Reversal
• Queens: Ambiguous Figures
• Jacks: Impossible Figures
• Clubs: Size and Figure Distortion
• Diamonds: Depth Perception
• Hearts: Figure Ground Illusions and Unstable Figures
• Spades: Seeing What Is Not There and Not Seeing What Is

The design of the card backs is the reverse image of the six of spades. On the back of your cards you will see small light blue dots at all of the intersections except the one you focus upon.

These cards are part of a series of educational playing cards and other products Y & B Associates have produced

Each deck is fifty-two (52) cards complete plus six (6) extra cards.

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