visual angle

World English Dictionary
visual angle
 
n
the angle subtended by an object at the lens of the eye

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

visual angle n.
The angle formed at the retina by the meeting of lines drawn from the periphery of the viewed object.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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