Resembling the chorion, particularly in containing many blood vessels.
noun
1
The pigmented vascular layer of the eyeball between the retina and the sclera.
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2
01
The choroid is a highly vascularised, darkly pigmented layer found in between the retina and the sclera of the eye.
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02
The choroid is darkly pigmented to fully absorb the light passing through the retina, so as to avoid internal reflection which would lead to blurry vision.