Research

Choroid

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Last updated: Dec 9th, 2024
Choroid
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The choroid or choroid coat, in the rear five-sixths of the globe of the eye, is loosely joined to the sclera and is honeycombed with blood vessels that provide nourishment to surrounding tissues. The choroid also contains numerous pigment-producing hormone cells that give it a brownish black appearance. The dark pigments of these cells absorb excess light and help keep the inside of the eye dark.