visual angle


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Related to visual angle: visual acuity

visual angle

[′vizh·ə·wəl ‚aŋ·gəl]
(optics)
The angle which an object subtends at the nodal point of the eye of an observer.

visual angle

The angle which an object or detail subtends at the point of observation; usually measured in minutes of arc.
References in periodicals archive ?
Compared to more conventional approaches that use either a concave mirror or a convex lens to increase the visual angle of a holographic 3D image, this new approach can achieve a higher degree of freedom of display size and visual angle.
Consequently, the last fixation prior to the registration of the light barriers with a length of a minimum of 100ms within a visual angle of 3[degrees] (88 pixels) defined the quiet eye period in milliseconds.
Selective attention of global and local information: Effects of visual angle, exposure duration and eccentricity on processing dominance.
Note that visual angle in this paper is not the angle a viewed object subtends at the eye which is called the object's angular size.
When the spider arrived at the end of the path, it was placed into a transparent open glass container and transferred to the center of an arena 90 cm in diameter (wall height, 48 cm; visual angle, 47[degrees]) (Fig.
The size of the omitted area varied in steps from 10[degrees] x 10[degrees] to 40[degrees] x 54[degrees] of visual angle.
3) Mike Deck, left, and Al Dey examine a trail in Rice Canyon for signs of wildlife, taking the same low-level visual angle that the animals would.
The images representing the use of the technology are frequently at a low visual angle to the viewer.
The second approach we used to examine interfacetal constancy involved what we termed the visual angle.
OUR EYES PERCEIVE SIZE BY JUDGING THE VISUAL ANGLE OF AN OBJECT.
3 degrees visual angle and was situated in the centre of the monitor display.

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