眼底出血是许多眼底血管性病变的一种共同的表现。人们常说:“眼睛是心灵的窗口。”全身的小动脉、静脉、毛细血管都处于组织器官的深层,不能在活体上直接观察,只有眼底即视网膜血管可以通过瞳孔直接观察到。因此全身性血管、血液性病变都可以从视网膜及其血管反应出来,同时也 Fundus hemorrhage is a common manifestation of many vascular diseases of the fundus. People often say: “The eye is the window of the soul.” The whole body arteries, veins, capillaries are in the deep tissues and organs, can not be directly observed in vivo, only the retinal blood vessels can be directly observed through the pupil. Therefore systemic blood, blood diseases can react from the retina and its blood vessels, but also