Nagel anomaloscope

A device that used to determine degree of red or green color vision deficit. A dial on the anomaloscope is adjusted until the viewer (patient) believes that the green-red balance is appropriate compared with a standard yellow light whose intensity can also be varied. When a person with normal color vision views the “match” made by a patient with abnormal color vision, a deficit in either red or green color vision is readily apparent.

Related Links


[The Nagel anomaloscope in the diagnosis of eye diseases]. – PubMed – NCBI

(PDF) The Nagel anomaloscope: Its calibration and recommendations for diagnosis and research

RGB Anomaloscope ? Color Blindness Test — Colblindor

The Nagel anomaloscope and seasonal variation of colour vision — Nature

A low-power, LED-based, high-brightness anomaloscope – ScienceDirect

OSA — Comparison of the Nagel Anomaloscope and a Dichroic Filter Anomaloscope*

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