An anomaloscope is an instrument used to test for color blindness.

The anomaloscope, described above, is also used in diagnosing anomalous trichromacy.

Protanomaly and deuteranomaly can be diagnosed using an instrument called an anomaloscope, which mixes spectral red and green lights in variable proportions, for comparison with a fixed spectral yellow.

Since there is no evidence that he controlled room temperature during his experiment, his findings now appear to be largely or wholly due to the device, called the Nagel anomaloscope, wrote Dr. Gabriele Jordan and Dr. John Mollon of the University of Cambridge in England.