Color vision test

With the large prevalence of color vision deficiencies (8% of males) and the wide range of professions that restrict hiring the colorblind for safety or aesthetic reasons, clinical color vision standards must be designed to be fast and simple to implement.

Color vision standards for academic use trade speed and simplicity for accuracy and precision.

[2] Pseudoisochromatic Plates are used as screening tools because they are cheap, fast and simple, but they do not provide precise diagnosis of CVD, and are often followed with another test if a user fails the PIP standard.

For example, it detects blue-yellow color blindness, is less susceptible to memorization and uses shapes, so it is accessible to the illiterate and young children.

The subject is asked to choose the dot closest to the central hue, allowing abnormalities to be detected according to the responses.

For example, the Farnsworth Lantern Test is used extensively by the United States Armed Forces and FAA.

[14] This test allows about 30% of individuals who fail the ishihara plates (generally those with mild CVD) to pass.

[17] The graduation of color vision tests to the digital space offers several advantages, but is not trivial.

Freely available web-based tests suffer from a lack of validation and typical viewing on uncalibrated screens.