What is the anatomy of lacrimal system relevant to periorbital infections?

Updated: Jul 31, 2018
  • Author: Bobak Zonnoor , MD; Chief Editor: Gil Z Shlamovitz, MD, FACEP  more...
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Answer

The lacrimal system includes the structures involved in the production and drainage of tears. The lacrimal gland is located in the lateral upper lid margin. It produces about 10 mL of secretions per day.

In the process of blinking, the eyes close from the lateral edge to the medial edge, pushing the tear film across the surface of the eye. Most of the tear volume is lost through evaporation. A small portion is drained from the lacrimal lake, located at the inner canthus, through the puncta and into the superior and inferior canaliculi. Tears then flow into the common canaliculus and lacrimal sac.

The lacrimal duct, which lies within the bone, connects the lacrimal sac with the eventual site of egress, the inferior meatus of the nose. [7]

Note the anatomical drawings below.

Eye and lacrimal duct, anterior view. Eye and lacrimal duct, anterior view.

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