3-D movies is the short name for a Stereoscopic 3-D film, a illusionary motion picture technology which has its roots based in stereoscopic photography. Based on the principle of depth perception (three-axis rule, also known as the third dimension), stereoscopic photography creates the 3 dimensional illusion by shooting the image at two slightly different angles. The glasses through which such images appear as 3-D are created on the cross-eyed view technique, the same principle as that of binoculars.

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