Lacrimal punctum


Lacrimal punctum

Infobox Anatomy
Name = PAGENAME
Latin =
GraySubject = 227
GrayPage = 1028



Caption = The tarsal glands, etc., seen from the inner surface of the eyelids. (Puncta lacrimalia visible at center left.)


Caption2 = The lacrimal apparatus. Right side. Note outdated terminology: The "Lacrimal ducts" in Gray's are now called "Lacrimal canals".
System =
Precursor =
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DorlandsPre = p_42
DorlandsSuf = 12680460
The lacrimal canaliculi, one in each eyelid, commence at minute orifices, termed puncta lacrimalia (or lacrimal punctum, or lacrimal point), on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis. There are two lacrimal puncta in the medial (inside) portion of each eye.

Together, they function to collect tears produced by the lacrimal glands. The fluid is conveyed to the lacrimal sac, and thence via the nasolacrimal duct to the inner nose.


=Additional

ee also

*Imperforate lacrimal punctum
*Lacrimal apparatus

External links

* [http://www.aafp.org/afp/980600ap/carter.html Diagram and discussion at aafp.org]


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Look at other dictionaries:

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  • Imperforate lacrimal punctum — An imperforate lacrimal punctum is a congenital disorder of dogs involving the lack of an opening to the nasolacrimal duct (tear duct) in the conjunctiva. Dogs normally have two lacrimal puncta, the superior and inferior. This condition can… …   Wikipedia

  • Lacrimal sac — The lacrimal apparatus. Right side. (Lacrimal sac visible at upper right.) …   Wikipedia

  • Lacrimal gland — Infobox Anatomy Name = PAGENAME Latin = glandula lacrimalis GraySubject = 227 GrayPage = 1028 Caption = Lacrimal apparatus of the right eye. The lacrimal gland is to the upper left. The right side of the picture is towards the nose. Caption2 =… …   Wikipedia

  • punctum — 1. The tip or end of a sharp process. 2. A minute round spot differing in color or otherwise in appearance from the surrounding tissues. 3. A point on the optic axis of an optical system. SEE ALSO: point. SYN: point (1). SEE ALSO: point, tip, end …   Medical dictionary

  • lacrimal canaliculus — n LACRIMAL DUCT (1) * * * canaliculus lacrimalis [TA] the short passage in an eyelid, beginning at the punctum, that leads from the lacrimal lake to the lacrimal sac; called also lacrimal duct …   Medical dictionary

  • lacrimal point — punctum lacrimale …   Medical dictionary

  • Lacrimal papilla — Infobox Anatomy Name = PAGENAME Latin = papilla lacrimalis GraySubject = 227 GrayPage = 1025 Caption = Front of left eye with eyelids separated to show medial canthus. (Lacrimal papilla not labeled, but region visible.) Caption2 = System =… …   Wikipedia

  • punctum lacrimale — [TA] lacrimal point: the opening on the lacrimal papilla of an eyelid, near the medial angle of the eye, into which tears from the lacrimal lake drain to enter the lacrimal canaliculi …   Medical dictionary

  • punctum — n.; pl. puncta (in anatomy) a point or small area, especially the puncta lacrimalia – the two openings of the tear ducts in the inner corners of the upper and lower eyelids (see lacrimal apparatus) …   The new mediacal dictionary


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