Nasolacrimal duct obstruction

Nasolacrimal duct obstruction
Other namesDacryocystitis
Tear system consists of lacrimal gland (a), punctums (b,e), canalicules (c,f), lacrimal sac (d). Tear is then drained through nasolacrimal duct (g) into nasal cavity
SpecialtyOphthalmology
Differential diagnosisTears arising from lacrimal sac fistula.

Nasolacrimal duct obstruction is the obstruction of the nasolacrimal ducts (better known as the tear ducts) and may be either congenital or acquired. Obstruction of the nasolacrimal ducts leads to the excess overflow of tears called epiphora.

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