Any stereoscopic image is called a stereogram. In 1903 Ives patented the parallax stereogram, the first "no glasses" autostereoscopic 3-D display technology. A single image random text stereogram. A stereogram consists of a pair of two-dimensional frames, one for each eye. The process used to develop the first Random Dot Stereogram is illustrated below. Stereogram versions became available to take advantage of stereo records.