A stereoscopic image where the left and right eye images are multiplexed onto the same plane (i.e. a screen or printed paper) using a color process, so that the 3d image is seen when using 3d glasses with different colored lenses.  Most common in the USA are the red/blue (red over left eye) or red/cyan glasses.

Holmes format stereoview
Also known as a stereocard, this was the first kind of 3d picture to obtain wide popularity in the USA, Europe, and Japan in the late nineteenth century.  A stereoview consists of a left and right eye image printed side by side on a seven inch wide card.  Typically the image was a square format, thus most stereoviews are printed on cards 3.5 inches tall.  But some taller types of cards were also produced, given different names: Cabinet (4” tall), Imperial (5”).

An optical device whereby a stereoscopic image is viewed using separate optics in front of each of the user’s left and right eyes.  These optics might include magnifying lenses or mirrors or both.  The purpose of the optics is to align and separately display the left and right images into the left and right eyes of the user.  The most common kind of stereoscope is a Holmes format stereoscope, which affords a magnified 3d view of L and R stereo pair prints, or stereocards, also called stereoviews.

Stereo Pair
An arrangement of two images side-by-side that provides a 3-d view in a stereoscope or using other methods.  Also describes a storage or transmission standard for stereo images, e.g. “side-by-side” (SBS) is an input image format understood by 3DTVs, which may then be converted to another kind of image format depending on the viewing technology (e.g. active shutter glasses or passive polarized glasses).