<unk>  (from Greek mono, meaning "one" and chromo, meaning "color") is the ability of organisms or machines to perceive only light intensity, without respect to spectral composition (color). Organisms with<unk>  are called monochromats. For example, about 1 in 30,000 people have monochromatic vision because the color-sensitive cone cells in their eyes do not function. Affected people can distinguish light, dark, and shades of gray but not color. Many species, such as marine mammals, the owl monkey and the Australian sea lion (pictured at right) are monochromats under normal conditions. In humans, absence of color discrimination or poor color discrimination is one among several other symptoms of severe inherited or acquired diseases, as for example inherited achromatopsia, acquired achromatopsia or inherited blue cone<unk> .
Monochromacy
Polychromasia
Zoobiquity
Binucleated cells
Nuclear atypia
Dyskaryosis
Dyschromia
Nuclear sclerosis