The Wain Dichroic Ladder was developed in 1959 and based on the Wilson Test. The intention of the test was to be more sensitive than the Ishihara Test, thereby detecting even "color weak" color normals. It was never used clinically.…

The length of one period of a wave. It is inversely proportional the the wave's frequency. Electromagnetic Radiation (photons) exist in almost any wavelength. The wavelengths with the Visible Spectrum can be combined in infinite ways to evoke any color…

A Tetrachromat who expresses 4 different Opsins, but lacks the neural circuitry to calculate a fourth Opponent Channel. In Behavioral Testing, they behave - for example - as trichromats. All color normal, female Carriers of red-green CVD are at least…

In the mid-1990s, many displays were only capable of displaying 8-bit colors, meaning there were only 256 different colors that could be displayed. Generally, these colors weren't even distributed perceptually uniform, so this left several gaps in an individuals gamut…

A simple technique that attempts to balance the colors in a photograph, which may deviate from the perceived colors because of: The cast of an IlluminantCamera sensor sensitivity If the white balance is 'off', all the colors in the image…

A type of Lantern from 1892 and remodeled in 1903, which found major use in the US Rail System (Cole 1982). It is now defunct. Williams Lantern