A variant of Rummy 500, using a board and a deck of cards with optical illusions on them. Here's the text on the box: Vision Impossible The Optical Illusion Game An amazing collection of dazzling optical illusions has been brought together to create Vision Impossible, the board game guaranteed to put your eyeballs to the test -- dark glasses are not allowed! Pit your wits against your opponents' and collect sets of classic crazy illusions to score the highest points -- but be warned, don't take too long, you'll find it's a race against each other! Vision Impossible is an exciting new game, based on an old favourite, suitable for the whole family. How to play: Players have to collect sets or runs of illusions, to score points. Vision Impossible is a game which combines skill and tactics, along with a sprinkling of good luck and the ability to endure endless eyeball bombardment by mind-bending optical illusions! Contents: Vision Impossible board, 50 optical illusion playing cards, full instructions.