Editing Tears (section)

=== Drainage of tear film ===
The [[lacrimal gland]]s secrete lacrimal fluid, which flows through the main excretory ducts into the space between the eyeball and the lids.<ref name=":0">{{Cite web|url=https://www.targethealth.com/post/tears-2|title=Tears|date=July 2, 2018|website=Target Health Blog|access-date=2019-07-07}}</ref> When the eyes blink, the lacrimal fluid is spread across the surface of the eye.<ref name=":0" /> Lacrimal fluid gathers in the [[lacrimal lake]] which is found in the medial part of the eye. The lacrimal papilla is an elevation in the inner side of the eyelid, at the edge of the lacrimal lake.<ref name=":0" /> The lacrimal canaliculi open into the papilla.<ref name=":0" /> The opening of each canaliculus is the lacrimal punctum. From the punctum, tears will enter the [[lacrimal sac]],<ref name="ReferenceA" /> then on to the [[nasolacrimal duct]], and finally into the [[nasal cavity]].<ref name=":0" /> An excess of tears, as caused by strong [[emotion]], can cause the nose to run. Quality of vision is affected by the stability of the tear film.<ref>{{cite journal|vauthors=Szczesna DH, Jaroński J, Kasprzak HT, Stenevi U|year=2006|title=Interferometric measurements of dynamic changes of tear film|journal=J Biomed Opt|volume=11|issue=3|pages=34028|bibcode=2006JBO....11c4028S|doi=10.1117/1.2209881|pmid=16822077|s2cid=24410898 |doi-access=free}}</ref>