Visual Findings

Key Observations:

1. Epiphora (excessive tearing) — There are distinct brown/rust-colored tear staining tracks running down from the medial canthi (inner corners of the eyes) along the nasal folds. This is consistent with chronic overflow of tears onto the facial fur.
2. Nasal fold prominence — The dog appears to have a prominent skin fold running vertically from the eye toward the nose, which is a known predisposing factor for tear pooling and secondary infection.
3. Periocular fur discoloration — The brownish staining around the eye and along the nasal fold track is caused by porphyrins in the tears, which oxidize and create the characteristic rust-red/brown color on light-colored fur.
4. Eye appearance — The eyes themselves appear dark and relatively normal in shape, though the eyelids show some crusting/debris at the margins (suggesting mild blepharitis or discharge accumulation).

Most Likely Diagnosis

Epiphora with Secondary Tear Staining (Porphyrin Staining)

• Medial canthal syndrome / medial lower lid entropion — common in Labradors, causes improper tear drainage
• Nasolacrimal duct obstruction or stenosis — reduced drainage leads to overflow
• Mild blepharitis — irritation/inflammation of the eyelid margins from chronic moisture

Differential Diagnoses to Rule Out

Recommended Next Steps

• Veterinary ophthalmologic exam — Schirmer tear test, fluorescein staining, nasolacrimal flush to assess duct patency
• Cleaning — Gentle periocular cleaning with saline or veterinary eye wipes
• Treatment depends on underlying cause — may include topical antibiotics, cyclosporine drops (if KCS), or surgical correction if anatomical

Note: This is an image-based assessment only and not a substitute for an in-person veterinary examination. A veterinarian should evaluate the dog directly.