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脉络膜厚约0.3～0.5mm,富有血管和黑色素细胞,外观呈褐色。在组织学上从外向内分为脉络膜上腔、血管层、毛细血管层和Bruch膜4层。脉络膜上腔位于巩膜与脉络膜固有层之间的潜在间隙。该层为一种薄板状结构,有发达的弹性纤维,其网眼中含有黑色素细胞、纤维母细胞及巨噬细胞。薄板组织与巩膜之间有明显的界限,该板在巩膜前部结合松弛,越往后越紧密。睫状后长动脉和睫状长神经沿脉络膜上腔前行。血管层富有黑色素细胞的疏松结缔组织包绕血管周围。该层在后极部可分
Choroid thickness of about 0.3 ~ 0.5mm, rich in blood vessels and melanocytes, the appearance of brown. Histologically, it is divided into four layers: suprachoroidal, vascular, capillary and Bruch’s membrane. The suprachoroidal space is located in the potential gap between the sclera and the choroidal lamina propria. This layer is a thin plate-like structure, developed elastic fibers, the mesh contains melanocytes, fibroblasts and macrophages. There is a clear boundary between the lamellar tissue and the sclera, which is loosely bonded to the anterior sclera and closer to the back. The ciliary long artery and the ciliary nerve move forward along the suprachoroidal space. Vascular layer Loose connective tissue rich in melanocytes surrounds the perivascular. This layer is separable at the posterior pole