anomaloscope

(redirected from Nagel anomaloscope)
Also found in: Medical.

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.
References in periodicals archive ?
The Nagel anomaloscope is a direct view spectroscope that presents a Rayleigh match (red + green = yellow).
2,3) Specificity is 100%, compared with the Nagel anomaloscope, if 'misreadings' are distinguished from errors on vanishing designs.