Wolf's Sociology 204

Stereograms are 3D images hidden within another picture. In order to view the 3-D images. They are a picture within a picture. Gazing at the picture we see an image or picture. However, if we look just right, we see a totally different picture emerge. These types of images are also sometimes called "magic eye."

Here are a couple of links to examples:

Magic Eye image of the week

3d Stereogram examples