This describes excessive tearing due to defective drainage of tears through the lacrimal passages.
Major causes include:
The patency of the lacrimal system should be explored to assess the precise cause of the epiphora. Careful inspection will reveal an ectropion or punctal occlusion. Probing and syringing of the lacrimal passages will reveal obstruction in the canaliculus or the nasolacrimal duct; the site may be precisely delineated by contrast radiography - dacryocystography. In infants, the patency of the nasolacrimal duct may be explored by syringing.
Last reviewed 01/2018