The Optical Illusion letterpress card is the perfect, unique card to celebrate the birthday of a loved one- just mind it doesn't make your eyes go funny! The card is inspired by Japanese Optical and Geometrical Art by Hajime Ouchi printed in 1977. Each card from the Keyhole Collection has a bit of hidden history and a link on the back unlocks more detailed information about the image, where it is held and a chance to view the original online.
