Definitions for maculaˈmæk yə lə; -ˌli
This page provides all possible meanings and translations of the word macula
Random House Webster's College Dictionary
mac•u•laˈmæk yə lə; -ˌli(n.)(pl.)-lae
a spot, esp. on the skin.
an opaque spot on the cornea. an irregularly oval, yellow-pigmented area on the central retina containing color-sensitive rods and the central point of sharpest vision.
Ref: Also called yellow spot.
Origin of macula:
1350–1400; ME < L: spot, blemish
a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field
macula, macula lutea, macular area, yellow spot(noun)
a small yellowish central area of the retina that is rich in cones and that mediates clear detailed vision
a patch of skin that is discolored but not usually elevated; caused by various diseases
An oval yellow spot near the center of the retina of the human eye, histologically defined as having two or more layers of ganglion cells, responsible for detailed central vision.
A spot, as on the skin, or on the surface of the sun or of some other luminous orb.
A rather large spot or blotch of color.
In planetary geology, an unusually dark area on the surface of a planet or moon.
Origin: From macula.
a spot, as on the skin, or on the surface of the sun or of some other luminous orb
a rather large spot or blotch of color
Macula of retina
The macula or macula lutea is an oval-shaped highly pigmented yellow spot near the center of the retina of the human eye. It has a diameter of around 6 mm and is often histologically defined as having two or more layers of ganglion cells. Near its center is the fovea, a small pit that contains the largest concentration of cone cells in the eye and is responsible for central, high resolution vision. The macula also contains the parafovea and perifovea. Because the macula is yellow in color it absorbs excess blue and ultraviolet light that enter the eye, and acts as a natural sunblock for this area of the retina. The yellow colour comes from its content of lutein and zeaxanthin, which are yellow xanthophyll carotenoids, derived from the diet. Zeaxanthin predominates at the macula, while lutein predominates elsewhere in the retina. There is some evidence that these carotenoids protect the pigmented region from some types of macular degeneration. Structures in the macula are specialized for high acuity vision. Within the macula are the fovea and foveola which contain a high density of cones.
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