CHOROID Meaning and
Definition
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The choroid is a highly vascular layer located between the retina and the sclera in the back part of the eye. It is part of the uvea, which also includes the iris and ciliary body, and it contributes to maintaining the overall health and function of the eye.
The choroid is made up of a dense network of blood vessels, including arteries and veins, that are responsible for supplying oxygen and nutrients to the retina. The large amount of blood flow in this layer helps regulate the temperature of the eye and ensures proper nourishment for visual cells.
In addition to its role in nourishment, the choroid also helps absorb excess light entering the eye, preventing it from reflecting back and causing visual disturbances. This absorption function is especially important in bright light conditions, as it helps maintain visual clarity and reduce glare.
Moreover, the choroid contains pigmented cells that help to prevent internal reflections within the eye, further improving visual acuity. Furthermore, it plays a crucial role in the production and regulation of eye fluids, specifically the aqueous humor.
In summary, the choroid is an integral part of the eye's anatomy, functioning to provide nourishment to the retina, regulate temperature, absorb excess light, prevent internal reflections, and control eye fluid production. Any abnormalities or diseases affecting the choroid can have significant consequences on vision and overall eye health.
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A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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A membrane resembling the chorion-applied to a coat of the eye.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
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Etymology of CHOROID
The word "choroid" comes from the Greek word "khoroeidēs", which means "like a membrane". This word is derived from "khorion", meaning "membrane" or "skin". In anatomy, the choroid refers to a layer of the eye located between the retina and the sclera, and it is named so due to its membranous appearance.
Similar spelling words for CHOROID
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