Choroidal lesions

Occurs in choroidal lesions. The choroid is dark brown, there is a irradiated membrane around the head of the optic nerve, and it is a turquoise triangle with a metallic luster. The thin film at the back 2/3 of the middle membrane of the eyeball, consisting of fibrous tissue, small blood vessels and capillaries, is soft and thin, brownish red, between the sclera and the retina, continuously connected behind the ciliary body, and the blood circulation of the choroid is nourishing the retina The outer layer, which contains rich pigments, acts as a light-shielding darkroom. The main function is to nourish the outer layer of the retina and the vitreous body, and have a light-shielding effect to make the reflected objects clear. At the same time, it protects the human visual system and regulates the entire visual nerve. Connected behind the ciliary body, it is rich in blood vessels and pigment cells, and has nutrition and light-shielding effects.

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