The fundus and routine histopathology were observed,ELISA was adapted to evaluate the density of platelet derived growth factor (PDGF) and the b-waves of flash electroretinogram (F-ERG) were recorded.

• 进行眼底及常规组织病理学观察，ELISA法检测玻璃体中血小板源性生长因子(PDGF)的浓度，闪光视网膜电图(F-ERG)b波波幅的检测。