变性性近视眼的病因为球径延长(轴性近视眼)。眼球各径向均变长,但主要是前后轴。如若考虑眼眶的解剖结构特点,则实际上主要是眼球后部延长。Garzino 1956年即详细描述了近视眼显微结构为弹性纤维及胶原纤维改变。在电子显微镜下对高度近视者的巩膜作了组织学检查,发现近视性葡萄肿处胶原纤维直径小于正常的巩膜胶原纤 The cause of degenerative myopia is the extension of spherical diameter (axial myopia). The eye of the radial are longer, but mainly before and after the shaft. Consider the orbital anatomy, in fact, the main eye is the back extension. Garzino 1956 is a detailed description of myopia microstructure of elastic fibers and collagen fibers change. Under the electron microscope on the myopia of the sclera made a histological examination showed that collagen fibers in myopia of the lesser diameter collagen fibers smaller than the normal sclera