Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术前造影以了解泪囊
大小和阻塞部位，以选择
佳手术适应证。
称单数）Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术前造影以了解泪囊大小和阻塞部位，以选择佳手术适应证。
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