Vidic B, Schuhmann G, Auerbach B
Klin Monbl Augenheilkd. 1984 Feb;184(2):125-7. doi: 10.1055/s-2008-1054425.
Forty eyes were studied in order to establish the relative function of the upper and lower lacrimal ducts. Following artificial occlusion first of the upper and then of the lower lacrimal ducts. Schirmer's No. 1 test was performed. The wetting of the test strips was used as an indirect measure of tear discharge. Higher quantities were discharged from the upper ducts of 17 eyes and from the lower ducts of 15. In 8 eyes the discharge from the upper and lower ducts was equal. The findings in this study thus disprove the commonly held belief that the upper lacrimal duct is plays a subordinate role in tear discharge.
为确定上下泪管的相对功能，对40只眼睛进行了研究。在分别人工阻塞上泪管和下泪管后，进行了施密特1号试验。试纸的湿润程度被用作泪液分泌的间接测量指标。17只眼睛的上泪管分泌量更高，15只眼睛的下泪管分泌量更高。8只眼睛的上下泪管分泌量相等。因此，本研究的结果反驳了普遍认为上泪管在泪液分泌中起次要作用的观点。
