anomaloscope

(redirected from Pickford-Nicholson anomaloscope)
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anomaloscope

[ə′näm·ə·lə‚skōp]
(optics)
An optical instrument for testing color vision, in which a yellow light whose intensity may be varied is matched against red and green lights whose intensity is fixed.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.