visual angle


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Related to visual angle: visual acuity

angle

 [ang´g'l]
the space or figure formed by two diverging lines, measured as the number of degrees one would have to be moved to coincide with the other.
acromial angle that between the head of the humerus and the clavicle.
alpha angle that formed by intersection of the visual axis with the optic axis.
buccal a's
1. the tooth angles between the buccal surface and the other surfaces of a posterior tooth; see accompanying illustration.
2. the cavity angles between the buccal wall of a tooth cavity and other walls.
cardiodiaphragmatic angle that formed by the junction of the shadows of the heart and diaphragm in posteroanterior radiographs of the heart.
cavity a's the angles formed by the junction of two or more walls of a tooth cavity, named according to the walls participating in their formation.
cavosurface angle the angle formed by the junction of a wall of a tooth cavity preparation and a surface of the crown of the tooth.
costovertebral angle the angle formed on either side of the vertebral column between the last rib and the lumbar vertebrae.
distal a's
1. the tooth angles formed between the distal surface and the other surfaces of a tooth; see accompanying illustration.
2. the cavity angles between the distal wall of a tooth cavity and other walls.
filtration angle (angle of the iris) the angle between the iris and cornea at the periphery of the anterior chamber of the eye, through which the aqueous humor readily permeates.
angle of jaw the junction of the lower edge with the posterior edge of the lower jaw.
lingual a's
1. the tooth angles formed between the lingual surface and the other surfaces of a tooth; see accompanying illustration.
2. the cavity angles between the lingual wall of a tooth cavity preparation and other walls.
angle of Louis an anatomical landmark located on the sternum; it can be felt as a notch or ridge at the top of the sternum.
mesial a's
1. the tooth angles formed between the mesial surface and other surfaces of a tooth; see accompanying illustration.
2. the cavity angles between the mesial wall of a tooth cavity and other walls.
meter angle the angle formed by intersection of the visual axis and the perpendicular bisector of the line joining the centers of rotation of the two eyes when viewing a point one meter distant (small meter angle) or the angle formed by intersection of the visual axes of the two eyes in the midline at a distance of one meter (large meter angle).
optic angle visual angle.
angle of pubis that between the pubic bones at the symphysis.
sternoclavicular angle that between the sternum and the clavicle.
tooth a's the angles formed by the junction of two or more surfaces of a tooth, named according to the surfaces participating in their formation
Tooth angles: Top, line angles; Bottom, point angles. From Dorland's, 2000.
(see accompanying illustration).
visual angle the angle between two lines passing from the edges of an object seen, through the nodal point of the eye, to the corresponding edges of the image of the object seen.

vis·u·al an·gle

the angle formed at the retina by the meeting of lines drawn from the periphery of the object seen.

visual angle

Etymology: L, visus, vision, angulus
the angle between two lines passing from the extremities of an object looked at, through the nodal point of the eye. Also called optic angle.

vis·u·al an·gle

(vizh'ū-ăl ang'gĕl)
The angle formed at the retina by the meeting of lines drawn from the periphery of the object seen.
References in periodicals archive ?
After plugging the numbers into Excel (see the table on the opposite page), I found that when positioned at the very beginning of the approach, the runway shape will subtend a visual angle of 2.
P]AOB is called the visual angle of [angle]AOB from the viewpoint P.
The distances from the observer's eyes to the display surfaces were adjusted to ensure correct visual angles to the display.
For example, a Snellen fraction of 20/20 is average, meaning a visual angle of one minute is perceptible, 20/10 is above average with a minimum perceptible visual angle of one-half minute and 20/40 is below average with a minimum perceptible visual angle of two minutes.
This is a box, with a viewfinder, around the screen which prevents head movements, isolates the subjects from distracting variables and maintains the visual angle and illumination constant.
For a fixation to be registered, point of gaze was maintained for a minimum period of 100 ms during which the eye did not move more than one degree of visual angle.
To determine the visual angle of each eye, sections from the frontal plane were used.
8[degrees] of visual angle and the inner with a radius of 1.
Figure 1A plots the amplitude of modulated optic nerve responses as a function of the visual angle of the square stimuli during the day (gray points) and night (black points).
This size is known as the Optimum Magnified Visual Angle, or OMVA, which is described in my book Visual Astronomy of the Deep Sky.
Wide visual angle, due to the micro sphere structure and the wide reflective area, the visual angle can be 180 degree.

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