tårekanalerna

Tårekanalene, also known as the lacrimal drainage system, are a network of ducts in the body responsible for draining tears from the eyes. This system begins at the puncta, small openings located on the inner corners of the upper and lower eyelids. From the puncta, tears flow into the lacrimal canaliculi, which are tiny tubes that lead to the lacrimal sac.

The lacrimal sac is a small, thin-walled reservoir situated in a groove on the side of the nasal bone. Tears collect here before being channeled further down into the nasolacrimal duct. This duct then empties into the nasal cavity. This connection explains why crying often results in a runny nose, as the excess tears drain into the nasal passages.

The primary function of the tårekanalene is to maintain the health and clarity of the eye's surface. Tears lubricate the eye, wash away debris and irritants, and contain antibodies that fight infection. When the drainage system is functioning properly, a small amount of tears is constantly being produced and drained, keeping the eye moist and comfortable.

Blockages or malformations of the tårekanalene can lead to various problems. These include excessive tearing (epiphora), recurrent eye infections (dacryocystitis), and in some cases, pain and swelling around the inner corner of the eye. These conditions can affect people of all ages, from infants to the elderly, and may require medical intervention to restore proper tear drainage.