Purpose:To study the characteristics of PEDF in cataractous aqueous humor and its expression in human lens epithelium.Methods:The PEDF concentration in the aqueous humor was measured by enzyme linked immunosorbent assay in senile (130cases) and congenital (18cases) cataract patients who underwent cataract phacoemulsification extraction surgery. Anterior lens capsular specimens were obtained from these patients to count lens epithelial cells(LEC) density. The Lens Opacities Classification System Ⅲ was used to classify the senile cataracts as cortical, nuclear, posterior subcapsular and mixed types of opacity, and quantitative analysis of the nuclear opacities was performed by Pentacam Scheimpflug imaging system. Anterior lens capsular specimens from another senile(10cases) and congenital (10cases) cataract were collected for immunofluorescence with polyclonal antibodies specific to human pigment epithelium-derived factor(PEDF).Results:The mean aqueous level of PEDF was(178. 9±87. 5)ng/ml, and there was neg

来源：眼科学报 2006 年 22卷 1期