Optical illusions come in all forms, from classic illustrations to minimalist modern art, but one category that continues to impress me is optical illusion photography. Often a result of confused ...

This optical illusion puzzle challenge will test your ability to observe. Take a close look at the picture. Has the cat been located? The first people to spot the cat will be those with the best eyes.

A mirror optical illusion, one of 80 mind-game exhibits at the Museum of Illusions, which will open May 23 in San Diego’s Gaslamp Quarter. (Illusion Photography) ...