peripheral vision

all that is visible to the eye outside the central area of focus; side vision. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

peripheral vision n.
vision produced by light rays falling on areas of the retina beyond the macula. Also called indirect vision.

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