- Lacrimal canaliculi
Name = PAGENAME
Latin = canaliculus lacrimalis
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GrayPage = 1028
Caption = The
lacrimal apparatus. Right side.
DorlandsPre = c_04
DorlandsSuf = 12208445
The lacrimal canaliculi, also known as the lacrimal canals or lacrimal ducts, are the small channels in each
eyelidthat commence at minute orifices, termed puncta lacrimalia, on the summits of the papillæ lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis.
* The "superior duct", the smaller and shorter of the two, at first ascends, and then bends at an acute angle, and passes medialward and downward to the
* The "inferior duct" at first descends, and then runs almost horizontally to the
At the angles they are dilated into ampullæ. Microscopically, they are lined by nonkeratinizing
stratified squamous epitheliumsurrounded by fibrous tissue.
Outside the latter is a layer of striped muscle, continuous with the lacrimal part of the
Orbicularis oculi; at the base of each lacrimal papilla the muscular fibers are circularly arranged and form a kind of sphincter.
Canaliculitis is an inflammation of the canaliculus. [ [http://www.revoptom.com/handbook/oct02_sec1_2.htm Handbook of Ocular Disease Management - Molluscum Contagiosum ] ]
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