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一、视网膜循环的特征眼球的血液循环可分为两个独立的系统,即视网膜中央血管系统和睫状血管系统,两者共同发源于眼动脉。营养视网膜的血管,内层是来源于视网膜中央血管系统的视网膜毛细血管,外层是来源于睫状血管系统的脉络膜毛细血管。中心凹处没有视网膜血管,因此,必须自脉络膜毛细血管层取得营养供给。视网膜中央动脉与中央静脉在视神经内是伴行的,而血流方向相反,在巩膜筛板及筛板后部两者有共同的外膜。视网膜动脉
First, the characteristics of retinal circulation Eye blood circulation can be divided into two independent systems, namely the central retinal vascular system and the ciliary system, the two originated in the common ophthalmic artery. Nutritional retina blood vessels, the inner layer is derived from the central retinal retinal capillaries, the outer layer is derived from the ciliary system of the choriocapillaris capillaries. There are no retinal vessels in the fovea, therefore, nutrient supply must be obtained from the choriocapillaris layer. The central retinal artery and the central veins are accompanied by the optic nerve, while the blood flow is in the opposite direction, with a common adventitia in both the scleral and trabecular plates. Retinal artery