cone cell

Thesaurus

Noun

cone cell - a visual receptor cell in the retina that is sensitive to bright light and to colorretinal cone, coneretina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nervevisual cell - one of the cells of the retina that is sensitive to lightiodopsin - a violet photopigment in the retinal cones of the eyes of most vertebrates; plays a role in daylight vision

Translations

cone cell

(kōn sel) One of the two types of visual receptor cells of the retina, essential for visual acuity and color vision; the second type is the rod cell.

cone cell

A cell in the retina whose scleral end forms a cone that serves as a light receptor. Vision in bright light, color vision, and acute vision depend on the function of the cones. See: rod cellSee also: cell

cone cell

a cone-shaped cell sensitive to light, found throughout the retina of most vertebrate eyes but concentrated within the FOVEA (see RETINAL CONVERVENCE). Cones are concerned with discrimination of colour and with visual acuity. There are three types of cone cell, each containing a different IODOPSIN and each giving maximum response when stimulated by the blue (450 nm), green (525 nm), and red (550 nm) parts of the visible spectrum. Our perception of any given colour is produced by the relative degree to which each cone is stimulated by any given wavelength of visible light. This is in accord with the TRICHROMATIC THEORY of colour vision which suggests that all colours can be produced by the mixing of blue, green and red. Thus the brain detects a yellow light by the equal stimulation of red and green cone gells. A pigment defect in one or more of the types of cone cell can lead to COLOUR BLINDNESS.

cone cell

cone cell

cone cell

cone cell

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cone cell

Synonyms for cone cell

noun a visual receptor cell in the retina that is sensitive to bright light and to color

Synonyms

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