tårkanalens

The tårkanalens, or lacrimal canaliculi, are two small ducts in the inner corner of the eyelids that drain tears from the eye. These tiny tubes begin at a small opening called the punctum, located on the margin of each eyelid. When a person blinks, tears are spread across the surface of the eye, and this action also helps to push excess tears towards the puncta. From the puncta, the tears enter the canaliculi and travel down towards the lacrimal sac.

The lacrimal canaliculi are lined with stratified squamous epithelium and are surrounded by connective tissue containing smooth muscle fibers. These muscle fibers, particularly around the punctum, play a role in widening the opening and drawing tears into the canaliculi. The two canaliculi typically join before reaching the lacrimal sac, though they may remain separate in some individuals. This drainage system is crucial for maintaining the health and clarity of the ocular surface by removing debris and excess fluid. Blockage or inflammation of the tårkanalens can lead to various eye conditions, including excessive tearing (epiphora) and infections.