Cat Blocked Tear Duct -

Blockages can be categorized as either congenital (present from birth) or acquired:

A veterinarian typically diagnoses a blockage using a . A harmless glowing dye is placed in the eye; if the duct is clear, the dye should appear at the cat's nose or mouth within minutes. According to VCA Animal Hospitals , if the dye does not appear, an obstruction is likely. Treatment options include:

A continuous overflow of clear, watery tears spilling over the lower eyelid and running down the face. cat blocked tear duct

(yellow or green) if a secondary infection, such as dacryocystitis (inflammation of the tear sac), develops. Common Causes

Complete slit-lamp biomicroscopy should rule out corneal disease (ulcers, keratitis), uveitis, or glaucoma as causes of reflex tearing. Blockages can be categorized as either congenital (present

Reddish-brown or rust-colored staining of the fur beneath the inner corners of the eyes. This discoloration occurs when porphyrins—iron-rich molecules naturally present in cat tears—oxidize upon contact with air.

Using a lacrimal cannula (e.g., 24-26 gauge), sterile saline is gently flushed through the superior punctum. Patency is confirmed if fluid flows freely from the nostril. Resistance or reflux from the same punctum indicates obstruction. Treatment options include: A continuous overflow of clear,

: Under sedation, a vet can use a small cannula to flush the duct with saline. This often clears minor debris or mucus plugs.

: Brachycephalic (flat-faced) breeds like Persians and Himalayans are highly predisposed. Their facial structure can compress or "scrunch" the tear ducts, preventing proper drainage.

Feline nasolacrimal duct obstruction is a manageable yet often chronic condition that requires a systematic diagnostic approach. The fluorescein dye transit test and ductal flushing remain essential diagnostic and therapeutic tools. Clinicians should differentiate congenital (breed-associated) from acquired (inflammatory, neoplastic, traumatic) causes to guide prognosis and treatment. While medical management suffices for mild cases, surgical bypass is available for severe, refractory obstructions. Further research into the role of viral rhinitis in chronic feline NLDO would improve long-term management strategies.

Feline Nasolacrimal Duct Obstruction: Etiology, Clinical Presentation, Diagnosis, and Management