Congenital Nasolacrimal Duct Obstruction

Overview, Signs and Symptoms of an Obstruction

Congenital Nasolacrimal Duct Obstruction

Nasolacrimal Duct Obstruction (NLDO) is very common in infants.

Blockage presents in one of four ways:

  1. simple obstruction
  2. congenital fistula (as seen in the photo)
  3. acute dacryocystitis
  4. congenital dacryocele or mucocele



Dacryocystocele or Dacryocele

dacryocystocele dacryocele

Location of Blockage & Anatomy

The very end of this duct is the most common place for blockage to occur. This site is called the valve of Hasner at the distal nasolacrimal duct and might represent failure of canalization of the epithelial cells that form the duct.

Medical Treatment of Congenital Obstructions

Surgical Treatments