It may be safely said that the field or "visual angle" of the unaided eye for distinct vision is at least 45° in all directions.
The length of the blowpipe is generally seven or eight inches, but this depends very much upon the visual angle of the operators.
Consequently the more distant the object, the smaller is its visual angle.
The visual angle of an object is the angle at the eye lens between the rays that have come from the ends of the object.
It will be human, and, as you know, comedy is but a matter of the visual angle.
The angle in question is called the angle of vision, or the visual angle.
Our doctrine has definitely outgrown the visual angle of ideology.
By this arrangement a visual angle is secured, and all objects lying within it are distinctly visible at the same time.
visual angle n.
The angle formed at the retina by the meeting of lines drawn from the periphery of the viewed object.