duplicity theory of vision

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• duplicity theory — noun or duplicity principle : a theory in physiology: the normal retina in man and other vertebrates contains a dual receptor mechanism consisting of (1) organs of achromatic low intensity vision and (2) organs of chromatic high intensity vision… …   Useful english dictionary

• theory — A reasoned explanation of known facts or phenomena that serves as a basis of investigation by which to seek the truth. SEE ALSO: hypothesis, postulate. [G. theoria, a beholding, speculation, t., fr. theoros, a beholder] adsorption t. of narcosis… …   Medical dictionary

• twilight vision — noun the ability to see in reduced illumination (as in moonlight) • Syn: ↑night vision, ↑night sight, ↑scotopic vision • Hypernyms: ↑sight, ↑vision, ↑visual sense, ↑ …   Useful english dictionary

• eye, human — ▪ anatomy Introduction  specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit       The eye is protected from mechanical injury… …   Universalium

• Schultze , Max Johann Sigismund — (1825–1874) German zoologist Schultze was born at Freiberg in Germany. He was educated at the University of Griefswald, where his father was professor of anatomy, and the University of Berlin. After a brief period on the staff of the University… …   Scientists

• List of psychology topics — This page aims to list all topics related to psychology. This is so that those interested in the subject can monitor changes to the pages by clicking on Related changes in the sidebar. It is also to see the gaps in Wikipedia s coverage of the… …   Wikipedia

• Johannes von Kries — (1853–1928) was a German physiological psychologist [cite book | title = Color Codes: Modern Theories of Color in Philosophy, Painting and Architecture, Literature, Music, and Psychology | author = Charles A. Riley II | publisher = Univ. Press of …   Wikipedia

• international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium

• literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …   Universalium

• France — /frans, frahns/; Fr. /frddahonns/, n. 1. Anatole /ann nann tawl /, (Jacques Anatole Thibault), 1844 1924, French novelist and essayist: Nobel prize 1921. 2. a republic in W Europe. 58,470,421; 212,736 sq. mi. (550,985 sq. km). Cap.: Paris. 3.… …   Universalium

• List of Torchwood characters — The following is a list of characters in the BBC science fiction television series Torchwood, including supporting characters, and important human villains. Main articles Captain Jack Harkness Main article: Jack Harkness Captain Jack Harkness,… …   Wikipedia