A group of diseases that negatively affect an individual's color vision. This is a colloquial name that is generally properly referred to as Color Vision Deficiency.

see Saturation or Chroma.

The science used to quantify human color perception, generally by analyzing the connection between light Spectra and Tristimulus values.

A manufacturer of Color Correction Lenses. Website

A manufacturer of Color Correction Lenses. website

A type of Color Task, where an individual must compare two colors and determine if they are the same or different. Examples include: Mixing paint to match a reference colorRelating a line in a graph to the same color in…

Complementary colors are pairs of colors which cancel each other out when combined and produce a grayscale color like white or black. The greatest contrast available to a given color is its complementary color. Complementary colors may also be called…

A colloquial name for Achromatopsia (including Monochromacy). Individuals with Complete Colorblindness see essentially in Grayscale. Also "Full" Colorblindness.

Organisms with Duplex Retinas generally have two independent visual systems: Scotopic Visual System - utilizing Rods and operating in low lightPhotopic Visual System - utilizing Cones and operating in bright light However, in Mesopic "twilight" conditions, these two systems can…

The type of photoreceptor cell in the retina that is responsible for color vision.

The set of cones an organism expresses. Cones and the Cone Complement are analogous to Chromosomes and the Karyotype. The typical human cone complement comprises the L, M and S cones.

These lines are drawn on top of a Chromaticity Diagram to indicate the Colors of Confusion for a certain type of CVD (typically Dichromacy). For Dichromats, all colors along a single line should be Colors of Confusion. However, the colors…

A pair of colors that look the same to an individual with CVD. These colors will lie along Lines of Confusion. For Protanopes, Green/Yellow and Blue/Purple are Confusion Pairs. Also Colors of Confusion. Metamers are a similar concept.

Existing at birth. Congenital CVD is the opposite of Acquired CVD. While some Congenital defects can be non-genetic, Congenital Colorblindness is almost always Genetic.

A type of Color Task, where an individual must understand implicit or explicit meaning of a color. For example: Associating the color red with "stop".Associating blue with cold.Associating color with level of ripeness/doneness/freshness of a food. The colorblind generally don't…

Contrast is an ambiguous term that applies to several related ideas, where a high contrast represents a large difference between two colors. Contrast is usually assumed to be Luminance Contrast, where a high contrast indicates a relative difference in luminance…

While Chromatic Adaptation allows an individual to see an object's "truer" color, this mechanism can also leads to some other problems, such as the Contrast Effect, where other colors shown near (spatially or temporally) the color to be perceived, affect…

The ability of an individual to discriminate between two very similar shades of gray. Various "gratings" are used to assess an individual's contrast sensitivity. Gratings are an alternating pattern of two colors, as with a barcode. When a grating is…

A Primary Color of the CMY/CMYK Color Models. A Secondary Color of the RGB Color Model. Cyan also lies on the Neutral Point for Protanopes and Deuteranopes and therefore appear gray/white.

A cause of blue-yellow CVD, simply described as a bluing of the vision. This constitutes a Tetartan defect, albeit non-congenital. The biggest causes are drug toxicity (e.g. Sildenafil, AKA Viagra), or as the result of cataract removal, since natural lenses…