anaglyph(redirected from anaglyphical)
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Stereogram consisting of two superimposed and laterally displaced drawings or photographs of the same scene but taken from two directions and in complementary colours (usually red and green). If the anaglyphs are viewed through filters of the same colour, one to each eye, and induce retinal disparity (of a fixed amount) they give rise to the perception of depth or stereopsis. A set of cards, or targets on the same card, to induce various amounts of retinal disparity can be used to detect and train fusion and stereopsis (e.g. Tranaglyphs). See complementary colour; retinal disparity; sensory fusion; depth perception; random-dot stereogram; stereopsis.