本研究应用氚—胸腺嘧啶核苷（￣３Ｈ－ＴｄＲ）体外渗入放射自显影技术，对４０只兔角膜碱性烧伤后新生的毛细血管进行标记。在光镜和扫描电镜下，显示新生毛细血管超微结构的改变。研究结果发现：新生毛细血管是由角膜缘处的毛细血管内皮细胞分裂、增生，形成新的毛细血管，伸展侵入角膜基质层内，形成毛细胞血管网，在扫描电镜下，可见新生毛细血管被增生的胶原纤维呈层所包围。 In this study, we used tritiated-thymidine (3H-TdR) to infiltrate autoradiography in vitro and labeled newborn capillaries after corneal alkaline burn in 40 rabbits. Under light microscope and scanning electron microscopy, shows the changes of neovascular ultrastructure. The results showed that: the newborn capillaries by the limbal capillary endothelial cell division, hyperplasia, the formation of new capillaries, stretching into the corneal stroma, the formation of hair cell vascular network, under the scanning electron microscope, showing the new capillaries are Hyperplastic collagen fibers are surrounded by layers.