Methods ： eigty - two normal eyes and 56 eyes with epiphora were investigated with digital subtraction dacryocystography and the dacryocystogram were studied 方法：利用数字减影泪道造影术对82只正常眼及56只溢泪眼进行检查，并对图像进行分析。
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Results ： lacrimal drainage system imaging by the digital subtraction dacryocystography provided reliable and accurate demonstration of lacrimal duct obstruction 结果：数字减影泪道造影术能够提供清晰的泪道图像并对泪道阻塞的部位及泪道改变作出准确的判断。
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Conclusion ： digital subtraction dacryocystography is a rapid ， effective and noninvasive imaging technique ， and it is helpful in the diagnosis ， treatment and study of lacrimal duct obstruction 结论：数字减影泪道造影术是一种快速、有效和无损伤的检查方法，在泪道阻塞的诊断和治疗中将起重要作用。
