This assessment, utilizing a series of colored caps, serves to evaluate an individual’s ability to discriminate between subtle differences in hue. The test subject is presented with a reference cap and asked to arrange the remaining fifteen caps in an order that represents a seamless chromatic progression. The arrangement is then analyzed to identify any existing color vision deficiencies and their nature, such as protan, deutan, or tritan defects.
The procedure offers a rapid and relatively simple means of detecting and classifying color vision abnormalities, proving valuable in various fields. Its historical application has ranged from occupational screening, ensuring individuals in color-critical roles possess adequate vision, to clinical settings, aiding in the diagnosis and monitoring of certain medical conditions affecting color perception. This tool has been instrumental in identifying congenital deficiencies, as well as acquired defects caused by diseases or medications.
