These cards are part of the 100+ Illusions and Visual Oddities double-deck set published in 1987 by Y and B Associates Inc. out of Hempstead, New York.
It is a clever novelty set that combines standard poker decks with classic perceptual psychology experiments and visual puzzles. Instead of traditional card backs, every card features a specific optical illusion paired with a prompt or question right on the card face.
![Deco Bronze First 100 Set [Bicycle] Front Thumbnail Image](https://d10gxh7wbuectb.cloudfront.net/decks/350x250/2455088264_front.jpg)
![Deco Silver First 100 Set [Bicycle] Front Thumbnail Image](https://d10gxh7wbuectb.cloudfront.net/decks/350x250/3847396382_front.jpg)






