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macula lutea
macula lu·te·a M0016800 (lo͞o′tē-ə)n. pl. maculae lu·te·ae (lo͞o′tē-ē′) A minute yellowish area containing the fovea centralis located near the center of the retina of the eye at which visual perception is most acute. Also called yellow spot.
[New Latin macula lūtea : Latin macula, spot + Latin lūtea, yellow.]macula lutea (ˈluːtɪə) n, pl maculae luteae (ˈluːtɪˌiː) (Anatomy) a small yellowish oval-shaped spot, rich in cones, near the centre of the retina of the eye, where vision is especially sharp. See also fovea centralis[New Latin, literally: yellow spot]mac•u•la (ˈmæk yə lə)
n., pl. -lae (-ˌli) -las. 1. a spot, esp. on the skin. 2. a. an opaque spot on the cornea. b. Also called yellow spot. an irregularly oval, yellow-pigmented area on the central retina containing color-sensitive rods and the central point of sharpest vision. [1350–1400; Middle English < Latin: spot, blemish] mac′u•lar, adj. Thesaurus| Noun | 1. |  macula lutea - a small yellowish central area of the retina that is rich in cones and that mediates clear detailed visionmacular area, yellow spot, macularegion, area - a part of an animal that has a special function or is supplied by a given artery or nerve; "in the abdominal region"retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve |
TranslationsMacula Lutea
macula lutea[′mak·yə·lə ′lüd·ē·ə] (anatomy) A yellow spot on the retina; the area of maximum visual acuity, being made up almost entirely of retinal cones. Macula Lutea (yellow spot), the site of the greatest keenness of vision on the retina of the eye of vertebrate animals and man. It is oval in shape and located opposite the pupil, somewhat above the point of entry of the optic nerve into the eye. The cells of the macula lutea contain a yellow pigment. Blood capillaries are found only in the lower part of the macula lutea; in its middle part the retina becomes much thinner, forming a central depression (the fovea), which contains only photoreceptors. In most animals and in man the central depression contains only cone cells; in some deep-water fish with telescopic eyes, the central depression contains only rod cells. In birds distinguished for their sharp vision, there may be up to three central depressions. In man the diameter of the macula lutea is approximately 5mm. In the central depression the cones are rod-shaped (the longest receptors of the retina). The diameter of the area free of rod cells is 500–550 microns; it contains about 30,000 cone cells. macula lutea
macula [mak´u-lah] (L.) 1. a stain, spot, or thickening; in anatomy, an area distinguishable by color or otherwise from its surroundings. Often used alone to refer to the macula retinae.2. a discolored spot on the skin that is not raised above the surface; called also macule.3. a corneal scar that can be seen without special optical aids; it presents as a gray spot intermediate between a nebula" >nebula and a leukoma" >leukoma.4. macula lutea. adj., adj mac´ular, mac´ulate.acoustic maculae (ma´culae acus´ticae) the macula sacculi and macula utriculi considered together.macula atro´phica a white atrophic patch on the skin.macula ceru´lea a blue patch on the skin seen in pediculosis.macula cribro´sa a perforated spot or area; one of three perforated areas (inferior, medial, and superior) in the wall of the vestibule of the ear through which branches of the vestibulocochlear nerve pass to the saccule, utricle, and semicircular canals.macula den´sa a zone of heavily nucleated cells in the distal renal tubule that feed information to the juxtaglomerular cells.macula fla´va a yellow nodule at one end of a vocal cord.macula folli´culi follicular stigma.macula germinati´va germinal area; the part of the ovum where the embryo is formed.macula lu´tea (macula lu´tea re´tinae) (macula re´tinae) an irregular yellowish depression on the retina, lateral to and slightly below the optic disk; receives and analyzes light only from the center of the visual field.macula sac´culi a thickening on the wall of the saccule where the epithelium contains hair cells that receive and transmit vestibular impulses.macula utri´culi a thickening in the wall of the utricle where the epithelium contains hair cells that are stimulated by linear acceleration and deceleration and by gravity.macula of retina [TA] an oval area of the sensory retina, 3 × 5 mm, temporal to the optic disc corresponding to the posterior pole of the eye; at its center is the central fovea, which contains only retinal cones. Synonym(s): macula lutea [TA], area centralis, macula retinae, macular area, punctum luteum, Soemmerring spot, yellow spotmacula lutea (lo͞o′tē-ə)n. pl. maculae luteae (lo͞o′tē-ē′) A minute yellowish area containing the fovea centralis located near the center of the retina of the eye at which visual perception is most acute. Also called yellow spot.macula lutea A yellowish depression on the retina which contains the fovea centralis, the area of sharpest vision.macula lutea The yellow spot in the centre of the RETINA on which the image of the point of greatest visual interest falls when something is observed. The macula is the most sensitive part of the retina and is devoid of blood vessels. Here, the concentration of colour-sensitive cones is maximal and the visual resolution is greatest. The full visual acuity is possible only by the use of the centre of the macula—the fovea.macula luteaAn oval area of the retina 3-5 mm in diameter, with the foveal depression at its centre, slightly below the level of the optic disc and temporal to it (its centre lies 3.5 mm from the edge of the disc). The side wall of the depression slopes gradually towards the centre where the fovea centralis is located and where the best photopic visual acuity is obtained. Around the fovea, the ganglion cells are much more numerous than elsewhere, being arranged in five to seven layers. The outer molecular layer is also thicker than elsewhere and forms the outer fibre layer of Henle and there is a progressive disappearance of rods so that at the foveola only cones are found. The area of the macula lutea is impregnated by a yellow pigment (macular pigment) in the inner layers and for that reason is often called the yellow spot. Syn. area centralis (although that area is considered to be slightly larger, about 5.5 mm in diameter); punctum luteum. See blue field entoptoscope; fovea centralis; macular pigment.macula lutea
Related to macula lutea: fovea, visual acuity, Ora serrataSynonyms for macula luteanoun a small yellowish central area of the retina that is rich in cones and that mediates clear detailed visionSynonyms- macular area
- yellow spot
- macula
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