Colour differentiation disorders rarely cause problems in everyday life, but they can certainly influence the selection of occupations that require excellent colour recognition – such as various occupations in transport (road, maritime and aviation), electrical and computer engineering, geology, mining, chemical and petroleum technology, construction, and many others.
Colour vision testing in occupational medicine is an integral part of the visual ability test, and for this purpose, the Ishihara colour recognition test is standardly (routinely) used, which is strictly selective and discrediting and not completely accurate.
Spectrophotometer-based devices are used to accurately determine colour vision.
Anomaloscopy (Greek: anomalos irregular, skopeo to observe) is a method of examining colour vision anomalies, that is, colour recognition defects. It is performed on a spectrophotometer device (anomaloscope) by the equalization method.