The tear fluid is used to wet cornea and conjunctiva and is produced in the lacrimal gland above the eyeball. The tears flow through the lacrimal dots into the lacrimal canals and thus reach the sinuses via the lacrimal sac, where they evaporate.
If the outflow is prevented by a narrowing of the tear ducts, a so-called stenosis, the tear fluid flows over the edge of the eyelid and tears run.
Depending on the cause of the constriction, various therapeutic approaches are used.
It is not uncommon for the cause of increased lacrimation not to the lacrimal ducts themselves but to excessive production of tears due to surface problems. This can be determined with a simple test. A dye (fluorescein) is added to the conjunctival sac and then protected, if the secretion from the nose is yellowish in color, the lacrimal ducts are continuous and the Lidrandplfege moves to the forefront of treatment.
