Article September 25, 1995 ISSUE

What are we seeing?

Charles Edward Langton

Our family recently received what seemed to me at the time to be a rather unusual gift—a stereogram, or holographic art poster. This art form is a combination of computer technology and artistic design.

At first glance, the poster appears to be nothing more than a surface covered with squiggles on a background of various colors. In order for the three-dimensional figure to be "seen," it is necessary for the viewer to try to look beyond the surface picture. As this is done, if the viewer's focal point is properly set, a three-dimensional image will become evident.

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