visual angle

visual angle n the angle formed by two rays of light or two straight lines drawn from the extreme points of a viewed object to the nodal point of the eye

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the angle formed between two lines extending from the nodal point of the eye to the extremities of the object seen; called also optic a.

Medical dictionary. 2011.

Look at other dictionaries:

  • Visual angle — Visual Vis u*al, a. [L. visualis, from visus a seeing, sight: cf. F. visuel. See {Vision}.] 1. Of or pertaining to sight; used in sight; serving as the instrument of seeing; as, the visual nerve. [1913 Webster] The air, Nowhere so clear,… …   The Collaborative International Dictionary of English

  • Visual angle — Angle An gle ([a^][ng] g l), n. [F. angle, L. angulus angle, corner; akin to uncus hook, Gr. agky los bent, crooked, angular, a gkos a bend or hollow, AS. angel hook, fish hook, G. angel, and F. anchor.] 1. The inclosed space near the point where …   The Collaborative International Dictionary of English

  • Visual angle — The visual angle is the angle a viewed object subtends at the eye, usually stated in degrees of arc.It also is called the object s angular size. The sketch helps to define it 1,2It shows an observer s eye looking at a frontal extent (the vertical …   Wikipedia

  • visual angle — regos kampas statusas T sritis fizika atitikmenys: angl. visual angle vok. Gesichtswinkel, m; Sehwinkel, m rus. угол зрения, m pranc. angle visuel, m …   Fizikos terminų žodynas

  • visual angle — regėjimo kampas statusas T sritis Kūno kultūra ir sportas apibrėžtis Kampas, kurį sudaro objekto, į kurį žiūrima, kraštiniai taškai ir mazginis akies taškas. Mažiausias regėjimo kampas, kuriuo akis mato du taškus atskirai, apibūdina regėjimo… …   Sporto terminų žodynas

  • visual angle — noun : the angle formed by two rays of light or two straight lines drawn from the extreme points of a viewed object to the visual point of the eye …   Useful english dictionary

  • visual angle — noun Optics the angle formed at the eye by rays from the extremities of an object viewed …   English new terms dictionary

  • Visual Angle Illusion — The visual angle, V degrees, subtended by a viewed object sometimes looks larger or smaller than its actual value, creating a visual angle illusion (V illusion).These V illusions have been explicitly described by many vision researchers,… …   Wikipedia

  • Visual — Vis u*al, a. [L. visualis, from visus a seeing, sight: cf. F. visuel. See {Vision}.] 1. Of or pertaining to sight; used in sight; serving as the instrument of seeing; as, the visual nerve. [1913 Webster] The air, Nowhere so clear, sharpened his… …   The Collaborative International Dictionary of English

  • Visual cone — Visual Vis u*al, a. [L. visualis, from visus a seeing, sight: cf. F. visuel. See {Vision}.] 1. Of or pertaining to sight; used in sight; serving as the instrument of seeing; as, the visual nerve. [1913 Webster] The air, Nowhere so clear,… …   The Collaborative International Dictionary of English

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