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perimetry


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Mapping the limits of the visual field for stimuli of various kinds (especially colours) with a perimeter, a device consisting of a light stimulus on the end of an adjustable arm that moves to various positions while the person being tested maintains a steady fixation on a point immediately ahead and reports visual sensations, the resulting map of the visual field being projected on to the inside of a spherical surface. [From Greek perimetros a boundary, from peri around + metron a measure]

Subjects: Psychology.


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