Crosseyed Puzzle

<p>Crosseyed Puzzle is 30 optical illusions that I invented over the years. It all started when I put a circle on a transparency and focused my eyes through the transparency paper until I saw two circles. This led me to the next step of drawing a face around the now two circles which gave me the face of a bison. Then came the next step of coming up with a non-abstract picture which looked to me like a Viking hat. Then I noticed that I didn't have to focus my eyes through the picture to convert the Viking hat into a Bison. Instead I could print the optical illusion on a plain paper and cross my eyes. Therefore I came up with the book Crosseyed Puzzle.</p>