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field of vision
extent of space in which objects are visible to an eye in a given position
Note 1 to entry: In the horizontal plane meridian the field of vision extends to nearly 190° with both eyes open, the area seen binocularly is about 120°, and the area seen by one eye only is about 154°.
Note 2 to entry: The extent of the field of vision tends to diminish with age.
Note 3 to entry: This entry was numbered 17-430 in CIE S 017:2011.