binocular parallax
Optic Op"tic ([o^]p"t[i^]k), Optical Op"tic*al ([o^]p"t[i^]*kal), a. [F. optique, Gr. 'optiko`s; akin to 'o`psis sight, 'o`pwpa I have seen, 'o`psomai I shall see, and to 'o`sse the two eyes, 'o`ps face, L. oculus eye. See {Ocular}, {Eye}, and cf. {Canopy}, {Ophthalmia}.] 1. Of, pertaining to, or using vision or sight; as, optical illusions. [WordNet sense 2]

Syn: ocular, optic, visual. [1913 Webster + WordNet 1.5]

The moon, whose orb Through optic glass the Tuscan artist views. --Milton. [1913 Webster]

2. Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina; the optic (or optical) axis of the eye. See Illust. of {Brain}, and {Eye}. [WordNet sense 3] [1913 Webster]

3. Relating to the science of optics or to devices designed to assist vision; as, optical works; optical equipment. [WordNet sense 1] [1913 Webster +PJC]

{Optic angle} (Opt.), the angle included between the optic axes of the two eyes when directed to the same point; -- sometimes called {binocular parallax}.

{Optic axis}. (Opt.) (a) A line drawn through the center of the eye perpendicular to its anterior and posterior surfaces. In a normal eye it is in the direction of the optic axis that objects are most distinctly seen. (b) The line in a doubly refracting crystal, in the direction of which no double refraction occurs. A uniaxial crystal has one such line, a biaxial crystal has two.

{Optical circle} (Opt.), a graduated circle used for the measurement of angles in optical experiments.

{Optical square}, a surveyor's instrument with reflectors for laying off right angles. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Binocular parallax — Parallax Par al*lax, n. [Gr. ? alternation, the mutual inclination of two lines forming an angle, fr. ? to change a little, go aside, deviate; para beside, beyond + ? to change: cf. F. parallaxe. Cf. {Parallel}.] 1. The apparent displacement, or… …   The Collaborative International Dictionary of English

  • binocular parallax — the seeming difference in position of an object as seen separately by one eye and then by the other, the head remaining stationary. Types include crossed, direct, and vertical p …   Medical dictionary

  • Parallax — Par al*lax, n. [Gr. ? alternation, the mutual inclination of two lines forming an angle, fr. ? to change a little, go aside, deviate; para beside, beyond + ? to change: cf. F. parallaxe. Cf. {Parallel}.] 1. The apparent displacement, or… …   The Collaborative International Dictionary of English

  • Parallax of the cross wires — Parallax Par al*lax, n. [Gr. ? alternation, the mutual inclination of two lines forming an angle, fr. ? to change a little, go aside, deviate; para beside, beyond + ? to change: cf. F. parallaxe. Cf. {Parallel}.] 1. The apparent displacement, or… …   The Collaborative International Dictionary of English

  • Parallax (disambiguation) — Parallax is the difference in the angular position of two stationary points relative to each other from different viewing positions.* The different viewing positions can arise from an observer s motion, called motion parallax. * The different… …   Wikipedia

  • Binocular vision — is vision in which both eyes are used together. The word binocular comes from two Latin roots, bini for double, and oculus for eye. [Harper, D. (2001). Online etymological dictionary. Retrieved April 2, 2008, from… …   Wikipedia

  • Parallax scanning — depth enhancing imaging methods rely on discrete parallax differences between depth planes in a scene. The differences are caused by a parallax scan. When properly balanced (tuned) and displayed, the discrete parallax differences are perceived by …   Wikipedia

  • Binocular disparity — refers to the difference in image location of an object seen by the left and right eyes, resulting from the eyes horizontal separation. The brain uses binocular disparity to extract depth information from the two dimensional retinal images in… …   Wikipedia

  • Parallax — For other uses, see Parallax (disambiguation). A simplified illustration of the parallax of an object against a distant background due to a perspective shift. When viewed from Viewpoint A , the object appears to be in front of the blue square.… …   Wikipedia

  • parallax — 1. The apparent displacement of an object that follows a change in the position from which it is viewed. 2. See phi phenomenon. [G. alternately, fr. par allasso, to make alternate, fr. allos, other] binocular p. the difference in the angles… …   Medical dictionary

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