英语语法分析

Methods 41 normal volunteers (82 eyes) and 179 cases (253 eyes) of epiphora were investigated with digital subtraction dacryocystography and images of lacrimal drainage system were studied.

方法利用数字减影泪道造影对41例正常人（82只眼）及179例溢泪患者（253只眼）进行检查，并对图像进行分析。