Anatomy of the Lacrimal Drainage System
The lacrimal drainage system drains tears from the conjunctival sac into the nose.

Components of Lacrimal Drainage System

1. Lacrimal Puncta
- Small openings situated on the:
- Upper lid margin
- Lower lid margin
- Located near medial canthus on lacrimal papillae
- Diameter ≈ 0.3 mm
- Directed posteriorly toward globe
Function
Collect tears from lacrimal lake.
2. Canaliculi
Each punctum continues as:
- Vertical canaliculus
- Horizontal canaliculus
A. Vertical canaliculus