Purpose To analyze the birth order effect of primary angle closure glaucoma(PACG) patients and to discuss the association of PACG with environmental risk factors as well as with genetic ones.

• 目的分析原发性闭角型青光眼(primary angle closure glaucoma,PACG)患者的出生顺序效应,探讨环境因素及遗传因素与PACG的关系。