本文讨论临床所见的几种视网膜血管异常。一、血管扩张1.Coats病:Coats最初将本病分为三型:第一型有大片视网膜渗出,无明显血管异常;第二型有大片视网膜渗出,伴有视网膜血管异常;第三型有大片视网膜渗出,伴有视网膜血管瘤,然此型代表完全不同于本病的另一种疾病。Coats病和Leber病是否各为一单独疾病仍有争论,多数学者认为是同一种疾病的不同阶段,视网膜 This article discusses several retinal vascular abnormalities seen clinically. First, the vasodilatation 1.Coats disease: Coats initially divided the disease into three types: the first type of large retinal exudate, no significant vascular abnormalities; the second type of large retinal exudate, associated with retinal vascular abnormalities; the third Large retinal exudative type, associated with retinal hemangiomas, this type represents a completely different disease from another disease. Whether or not Coats and Leber are all separate diseases is still controversial. Most scholars think that different stages of the same disease, the retina