Obstruction or Blockage of the Nasolacrimal Duct Will Prevent Drainage

Question

Obstruction or blockage of the nasolacrimal duct will prevent drainage of tears into the:
A) aqueous humor
B) vitreous humor
C) nasal cavity
D) ciliary body

Accepted Answer

The nasolacrimal duct drains tears from the lacrimal sac into the nasal cavity. Obstruction of this duct would prevent tear drainage into the nasal cavity, leading to symptoms such as watery eyes or epiphora.