An optical instrument used to detect or measure color vision defects and anomalies, especially in testing for color blindness.
From Greek anomalos 'uneven' plus -scope from skopein 'to view' or 'examine.' The device emerged in the late 19th century as ophthalmologists developed systematic ways to test for irregularities in color perception.
The anomaloscope is a beautiful example of science—a machine designed specifically to find exceptions—doctors use it to prove someone's eyes see colors differently than the norm!
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