Lacrimal punctum
The lacrimal punctum (plural puncta) or lacrimal point, is a minute opening on the summits of the lacrimal papillae, seen on the margins of the eyelids at the lateral extremity of the lacrimal lake. There are two lacrimal puncta in the medial (inside) portion of each eyelid. Normally, the puncta dip into the lacrimal lake.
| Lacrimal punctum | |
|---|---|
The tarsal glands, etc., seen from the inner surface of the eyelids. (Puncta lacrimalia visible at center left.) | |
The lacrimal apparatus. Right side. Note outdated terminology: The "Lacrimal ducts" in Gray's are now called "Lacrimal canals". | |
| Details | |
| Identifiers | |
| Latin | Puncta lacrimalia |
| TA98 | A15.2.07.065 |
| TA2 | 6854 |
| FMA | 59365 |
| Anatomical terminology [edit on Wikidata] | |
Together, they function to collect tears produced by the lacrimal glands. The fluid is conveyed through the lacrimal canaliculi to the lacrimal sac, and thence via the nasolacrimal duct to the inferior nasal meatus of the nasal passage.
Additional images
A close up of a lacrimal punctum.
Lower lacrimal punctum through slit lamp biomicroscope
See also
References
This article incorporates text in the public domain from page 1028 of the 20th edition of Gray's Anatomy (1918)
External links
- Diagram and discussion at aafp.org