Nasolacrimal Duct Cat Link

The nasolacrimal duct (NLD) is a critical component of the feline ocular adnexa, responsible for the drainage of tears from the ocular surface into the nasal cavity. While often overlooked in routine examinations, the NLD is frequently implicated in cases of epiphora and recurrent conjunctivitis in domestic cats ( Felis catus ). This paper reviews the anatomical trajectory of the feline NLD, contrasts its physiology with other domestic species, and discusses the pathophysiology of common clinical conditions such as dacryocystitis and imperforate puncta. Furthermore, current diagnostic approaches and therapeutic interventions, including flushing techniques and stenting, are evaluated.

Obstructions can be present from birth or develop later in life due to health issues:

Tears can cause hair to clump, which may painfully rub against the eye and cause scratches. nasolacrimal duct cat

The nasolacrimal duct, also known as the tear duct, plays a vital role in the feline eye. Here's a feature on this essential anatomical structure:

When this "plumbing" gets blocked, tears have nowhere to go but out, leading to a condition called (overflowing tears). This isn't just a cosmetic issue; the constant moisture can lead to: The nasolacrimal duct (NLD) is a critical component

In the cat, the viscosity of the tear film and the diameter of the puncta play significant roles in drainage efficiency. The termination of the duct within the ventral nasal meatus means that normal tear drainage often goes unnoticed by owners, as it does not typically cause moisture at the external nostril unless drainage is excessive.

Dysfunction of the NLD generally results from obstruction (stenosis, foreign bodies, or inflammation) or congenital anomalies. Here's a feature on this essential anatomical structure:

If your cat is experiencing problems with their nasolacrimal duct, you may notice: