Transcription: until a short time ago all stereograms were composed of two pictures. In 1979 the psychologist Christopher Tyler and the programmer Maureen Clark introduced the first single image stereogram. This type of stereogram also known as an autostereogram is better than the random dot type by Eulesh for seeing the stereo effect. With his prototype Tyler took the biggest steps forward in the history of stereosyling In one fell swoop, he had expanded the areas of use for stereoscopic media.
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