monochromatism /mono·chro·ma·tism/ (-kro´mah-tizm) monochromatic vision.
monochromatism [mon″o-kro´mah-tizm), (mon″o-kro″mah-top´se-ah] (monochromatopsia) monochromatic vision.
cone monochromatism that in which there is some cone function.
rod monochromatism that in which there is complete absence of cone function.
mon·o·chro·ma·tism (m n  -kr  m-t zm)n. 1. The state of having or exhibiting only one color. 2. See achromatopsia. |
monochromatism [mon″o-kro´mah-tizm), (mon″o-kro″mah-top´se-ah] (monochromatopsia) monochromatic vision.
cone monochromatism that in which there is some cone function.
rod monochromatism that in which there is complete absence of cone function.
achromatism
1. The condition of being totally colour blind. Syn. achromatopsia.
2. Absence of colour.
3. Condition of a lens or an optical system corrected for, or free from, chromatic aberration. See monochromat.
monochromat
Person who has a condition of monochromatism (total colour blindness). There are two types of monochromats: the cone monochromat whose photopic luminosity curve resembles the normal and who has normal visual acuity and dark adaptation; and the rod monochromat whose retina does not contain functional cones and, therefore, has poor vision, photophobia and sometimes associated nystagmus and myopia. Monochromats are very rare: estimated at about three persons in 100 000. See achromatopsia; defective colour vision; cone dystrophy.
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