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 diagram...

In human visual perception, the visual angle, denoted θ, subtended by a viewed object sometimes looks larger or smaller than its actual value. One approach...

and the typically large screen sizes. A larger display increases the visual angle at which content is viewed, both of which contribute to an increased...

optotype on the retina is the same. That size is specified as a visual angle, which is the angle, at the eye, under which the optotype appears. For 6/6 = 1...

vision scientists to estimate visual acuity. The name of the chart is an abbreviation for "logarithm of the Minimum Angle of Resolution". The chart was...

[citation needed] Visual acuity is the distance at which test is made / distance at which the smallest optotype identified subtends an angle of five arcminutes...

origin is given in degrees of visual angle; it's a measure of eccentricity. Each polar axis is a meridian of the visual field. For example, the horizontal...

Monocular cues include relative size (distant objects subtend smaller visual angles than near objects), texture gradient, occlusion, linear perspective...

(pachymetry), and visual field testing. Glaucoma has been classified into specific types: Primary glaucoma (H40.1-H40.2) includes primary open-angle glaucoma (chronic...

In glaucoma, visual field defects result from damage to the retinal nerve fiber layer. Field defects are seen mainly in primary open angle glaucoma. Because...

the "critical visual angle"), is small in daylight conditions, larger in low light levels. The law is of special significance in visual astronomy, since...

the visual angle is close to or more than 180 degrees in at least one direction. For example, a "diagonal fish eye" would have a viewing angle of at...

either as an angular size (the visual angle that it subtends at the eye, corresponding to the proportion of the visual field that it occupies), or as...

human (and much of animal vision) is the visual field. It is defined as "the number of degrees of visual angle during stable fixation of the eyes". Note...

20/20 vision is the ability to resolve a spatial pattern separated by a visual angle of one minute of arc, from a distance of twenty feet. A 20/20 letter...

units of angle) describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in...

functions of one or more angles. They are distinct from triangle identities, which are identities potentially involving angles but also involving side...

In geometry, a solid angle (symbol: Ω) is a measure of the amount of the field of view from some particular point that a given object covers. That is...

lateral and horizontal visual field, about 15 degrees from fixation. The size of the monocular scotoma is 5×7 degrees of visual angle. A scotoma can be a...

the effects of the passage of time), ordinary subject matter, unusual visual angles, and inclusion of movement as a crucial element of human perception...

instead of a visual angle. The units are usually measured in pixels. Brain cells (neurons) in a part of the brain responsible for processing visual information...

in metres at which the height of a lower case 'x' letter subtends a visual angle of 5 minutes of arc at the nodal point of the eye. The M system is said...

primarily used for object avoidance. Research has shown that the minimum visual angle for obstacles avoided by their lower lens eyes matches the half-widths...

Visual flight or visual attitude flying is the control of an aircraft via outside references (such as the sky or the runway in takeoff). For aircraft...

gaze or, when viewed at large angles, in (or out of) the "corner of one's eye". The vast majority of the area in the visual field is included in the notion...

angle, also known as Dutch tilt, canted angle, vortex plane, or oblique angle, is a type of camera shot that involves setting the camera at an angle so...

have two visual opsins different from those in all the other eyes, sensitive to blue and UV light. The posterior lateral eyes (PLEs) are wide-angle motion...

how much an eye can differentiate one object from another in terms of visual angles. Resolution in CPD can be measured by bar charts of different numbers...

Launch Resistant to Countermeasures Automatic Target Tracking ±40 Degree Visual Angle Warhead High Explosive, Semi Armor Piercing Warhead Programmable Impact...

value under which the crowded letter is seen (eccentricity measured as visual angle away from the fovea's center). If, e.g., a letter is shown at 2.5 deg...