Lacrimal system
The tear apparatus (lat. Apparatus lacrimalis ) is a summary of the anatomical structures that are responsible on the one hand for tear production and on the other hand for their forwarding and removal. It is an appendage organ of the eye and consists of the following parts:
- The lacrimal glands that produce the tear fluid and their ducts that carry the tear fluid to the surface of the eye.
- The lacrimal points ( puncta lacrimales ), the lacrimal tubules ( canaliculi lacrimales ), as well as the lacrimal sac ( saccus lacrimalis ) and the lacrimal-nasal duct ( ductus nasolacrimalis ), which convey the tear fluid to the nasal cavity and in their entirety represent the draining tear ducts .
Diseases of the producing part of the tear system have an impact on the amount and composition of the tear fluid, which can lead to wetting disorders and damage to the surface of the eye (e.g. keratoconjunctivitis sicca ). Diseases of the tear ducts often lead to disturbances in the drainage of the tear fluid. The result is a watery eye ( Epiphora ). Further diseases of the lacrimal system are inflammation of the lacrimal sac ( dacryocystitis ) and the lacrimal glands ( dacryoadenitis ).
literature
- Paul Simoens: organ of vision , organum visus. In: Franz-Viktor Salomon, Hans Geyer, Uwe Gille (Ed.): Anatomy for veterinary medicine. 2nd, revised and expanded edition. Enke, Stuttgart et al. 2008, ISBN 978-3-8304-1075-1 , pp. 579-612.
- Marianne Abele-Horn: Antimicrobial Therapy. Decision support for the treatment and prophylaxis of infectious diseases. With the collaboration of Werner Heinz, Hartwig Klinker, Johann Schurz and August Stich, 2nd, revised and expanded edition. Peter Wiehl, Marburg 2009, ISBN 978-3-927219-14-4 , p. 112 f. ( Lacrimal apparatus ).