Nagashima K, Kido R
Jpn J Ophthalmol. 1984;28(3):259-62.
A total of 88 cases of impaction of the eyelash into the lacrimal punctum were collected from 34,256 outpatients, and 39 cases of lash impaction into the Meibomian gland duct were found among 30,456 outpatients. Observations of these patients were analyzed to find the relative roles of the upper and lower lacrimal canaliculi in the normal tear drainage. In the cases of the Meibomian gland duct, the impaction occurred at a similar incidence in the upper and lower eyelids. However, in the cases of the punctum, the upper punctum was affected about three times more frequently than the lower punctum. The impaction of the eyelashes probably occurred at about the same rate in both puncta, but the present results suggested that the lashes in the lower punctum disappeared more easily into the drainage system than the lashes in the upper punctum. The lower canaliculus should, therefore, play the major role in normal tear drainage.
在34256例门诊患者中，共收集到88例睫毛嵌入泪小点的病例；在30456例门诊患者中，发现39例睫毛嵌入睑板腺导管。对这些患者的观察结果进行分析，以确定上下泪小管在正常泪液引流中的相对作用。在睑板腺导管病例中，上下眼睑的嵌入发生率相似。然而，在泪小点病例中，上泪小点受影响的频率大约是下泪小点的三倍。睫毛嵌入两个泪小点的发生率可能大致相同，但目前的结果表明，下泪小点的睫毛比上泪小点的睫毛更容易进入引流系统。因此，下泪小管在正常泪液引流中应起主要作用。
