Obstruction of nasolacrimal drainage apparatus

Last revised by Mostafa Elfeky on 5 Aug 2023

Obstruction of nasolacrimal drainage apparatus results in epiphora and can be primary or secondary, congenital or acquired. Obstruction can occur at canalicular, lacrimal saccular, or nasolacrimal ductal (post-saccular) levels.

Causes of obstruction

Congenital obstruction
Acquired obstruction

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