Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术前造影
了解泪囊的大小和阻塞的部位，选择最佳手术适
。
Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术前造影了解泪囊的大小和阻塞的部位，选择最佳手术适。
明：
上
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