Sometimes in more severe cases, the blood can come up the nasolacrimal duct and out from the eye.

Another cause could be poor reconstruction of the nasolacrimal duct system after trauma to the area.

Additionally, the nasolacrimal duct and sinuses are connected to the nasal passage.

Medially, near the orbital margin, is located the groove for nasolacrimal duct.

Infection of the nasolacrimal duct can result in chronic epiphora (excess tearing).

Preventive treatment of severe dryness with measures such as nasolacrimal duct occlusion is important.

Jessup reports one owl having eye lesions from infection spreading into the nasolacrimal duct.

The nasal cavity contains the nasolacrimal duct, which drains tears from the eyes and out the nose.

Nasolacrimal duct cysts are a cutaneous condition that is a developmental defect present at birth.

Excess tears flow through nasolacrimal duct which drains into the inferior nasal meatus.

If no fluid passes but it all comes bakck through either ounctum Nasolacrimal duct onstruction is present.

The canal containing the nasolacrimal duct is called the nasolacrimal canal.

These pass the tears on to the lacrimal sac, in turn to the nasolacrimal duct, which dumps them out into the nose.

Nasolacrimal duct obstruction and orbital cellulitis associated with chronic intranasal cocaine abuse.

Obstruction of the nasolacrimal duct leads to the excess overflow of tears called epiphora.

Nasolacrimal duct apparent.

Lacrimal bone: contains the nasolacrimal duct, which carries fluid from the surface of the eye, to the nose

In the waking individual, blinking of the eyelid causes rheum to be washed away with tears via the nasolacrimal duct.

Congenital nasolacrimal duct obstruction is most often due to an imperforate membrane at the valve of Hasner.

The fluid is conveyed to the lacrimal sac, and thence via the nasolacrimal duct to the inner nose.

When nasolacrimal duct obstruction is secondary to a congenital barrier it is referred to as dacrocystoceles.

The upper part of this fossa lodges the lacrimal sac, the lower part, the nasolacrimal duct.

As with other flat-faced animals, the Exotic's tears are prone to overflowing the nasolacrimal duct, dampening and staining the face.

The nasolacrimal duct (sometimes called the tear duct) carries tears from the lacrimal sac into the nasal cavity.

Dacryocystitis is an inflammation of the nasolacrimal sac, frequently caused by nasolacrimal duct obstruction or infection.