Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Dichromat(also: Dichromacy, Dichromatic Vision)
- A person with colour vision based on only two types of functional cone cells in the retina instead of the typical three, resulting in a reduced ability to distinguish certain colours. Dichromats perceive colour in a two-dimensional colour space rather than the three-dimensional…
- Discrimination Ellipse(also: Discrimination Ellipsoid, MacAdam Ellipse)
- A region in a color space surrounding a given color within which other colors cannot be distinguished from it by an observer. In two dimensions this region forms an ellipse; in three-dimensional color spaces it becomes an ellipsoid. The size and shape of discrimination ellipses…
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