Stereoscopy is an image technique that creates the illusion of depth and three-dimensional space. This method uses our ability to see the world three-dimensionally with both eyes and attempts to simulate this effect artificially.
Anaglyph is a method of creating stereoscopic/three-dimensional (3D) images using special glasses. This technique uses different colours for each eye, creating the illusion of depth and space.
3D glasses ensure that each human eye sees a different image, which - if a suitable image source is available - can create an impression of depth and space.
Three-dimensional paintings and films are like a window into another world: their image is not flat, but plastic, as if it really existed. But how do 3D photographs and 3D films actually work? What is behind the magical impression of depth?