Doane M G
Ophthalmology. 1981 Aug;88(8):844-51. doi: 10.1016/s0161-6420(81)34940-9.
High-speed photography, using picture rates up to 500/sec, has confirmed many key aspects of the tear drainage process reported over the years by various investigators. The punctal openings are seen to elevate themselves from the lid margin at the start of the closing phase of the blink, allowing their forceful meeting and occlusion by the time the closing lid is halfway down. Completion of lid closure then compresses the canaliculi and lacrimal sac, forcing contained fluid through the drainage system. The elastic expansion of the channels during the opening phase of the blink forms a suction, holding the lid margins at the punctal region together as the lids open. During the latter part of this opening, the punctal areas are seen to "pop' apart suddenly as the vacuum is broken, and tear fluid from the marginal tear strips is drawn into the puncta in the first few seconds following the blink.
高速摄影采用高达每秒500帧的画面速率，证实了多年来不同研究者所报道的泪液引流过程的许多关键方面。在眨眼的闭合阶段开始时，可见泪点开口从睑缘抬起，使得在闭合的眼睑下降到一半时它们能有力地会合并闭塞。眼睑完全闭合后会压缩泪小管和泪囊，迫使其中的液体通过引流系统。眨眼的张开阶段，通道的弹性扩张形成吸力，在眼睑张开时将睑缘在泪点区域拉拢在一起。在这个张开阶段的后期，随着真空被打破，可见泪点区域突然“弹开”，眨眼后的最初几秒内，来自边缘泪液条的泪液被吸入泪点。
