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On Lacrimal Drainage

On Lacrimal Drainage Ophthalmologica 164: 409-421 (1972) B. R osengren University Eye Clinic, Gothenburg The transport of tear fluid from the conjunctival sac to the inferior nasal meatus has always been a contentious subject. Originally, it was thought that the force of gravity was solely responsible [Petit, 1734], but the fact that epiphora exists in facial paralysis proves that some active function, mediated by the orbicular muscle, must be at work. There has been much speculation about this mechanism, which is reasonable in view of the complex structure of the orbicular muscle and also because of the almost impossible task of determining the effect of the various muscle bundles on the membranous lacrimal passages. At first attention was directed mainly to any changes that might occur in the volume of the lacrimal sac when the medial palpebral ligament is stretched. Then clinical observations in Toti’s operation, who inactivated the sac without affecting the transport of tear fluid, transferred attention to the canaliculi [Frieberg, 1917; R osengren, 1927], These possess the means of active functioning because their walls have a strong elastic structure, stable enough to keep the lumen open between blinks. Active compression of these canals during blinking movements is quite possible http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ophthalmologica Karger

On Lacrimal Drainage

Rosengren, B.
Ophthalmologica , Volume 164 (6): 13 – Jan 1, 2010
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Publisher
Karger
Copyright
© 1972 S. Karger AG, Basel
ISSN
0030-3755
eISSN
1423-0267
DOI
10.1159/000306782
Publisher site
See Article on Publisher Site

Abstract

Ophthalmologica 164: 409-421 (1972) B. R osengren University Eye Clinic, Gothenburg The transport of tear fluid from the conjunctival sac to the inferior nasal meatus has always been a contentious subject. Originally, it was thought that the force of gravity was solely responsible [Petit, 1734], but the fact that epiphora exists in facial paralysis proves that some active function, mediated by the orbicular muscle, must be at work. There has been much speculation about this mechanism, which is reasonable in view of the complex structure of the orbicular muscle and also because of the almost impossible task of determining the effect of the various muscle bundles on the membranous lacrimal passages. At first attention was directed mainly to any changes that might occur in the volume of the lacrimal sac when the medial palpebral ligament is stretched. Then clinical observations in Toti’s operation, who inactivated the sac without affecting the transport of tear fluid, transferred attention to the canaliculi [Frieberg, 1917; R osengren, 1927], These possess the means of active functioning because their walls have a strong elastic structure, stable enough to keep the lumen open between blinks. Active compression of these canals during blinking movements is quite possible

Journal

Ophthalmologica – Karger

Published: Jan 1, 2010

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