Vet Guide to Distichiasis in Dogs 2025 🐶🩺

Vet Guide to Distichiasis in Dogs 2025–🐶🩺

By Dr. Duncan Houston BVSc

Distichiasis refers to extra eyelashes emerging from the meibomian gland openings along the lid margin—abnormal growth that may brush the cornea and cause damage 😣.

📍 Causes & Breeds

Congenital, inherited defect—exact genetic mechanism unknown.
Common breeds include Cocker Spaniels, Cavalier King Charles Spaniels, Bulldogs, Dachshunds, Shih‑Tzus, Poodles, Flat‑Coated Retrievers, Parson Russells, Boxers, Boston Terriers & Yorkies.

⚠️ Clinical Signs

Often an incidental finding in asymptomatic dogs.
When lashes irritate: chronic tearing (epiphora), blepharospasm (squinting), conjunctival redness, corneal ulcers, scarring & discomfort.

🔬 Diagnosis

Detailed eyelid examination, often using magnification or a slit-lamp to detect abnormal lashes.
Fluorescein staining checks for corneal damage; tear production is assessed with the Schirmer test.
Differentiation needed: ectopic cilia (follicles through the conjunctiva) are often more painful and ulcerogenic.

💊 Treatment Options

Benign neglect: No treatment if lashes are soft and asymptomatic.
Lubricants: Artificial tears to reduce irritation.
Manual epilation: Plucking with forceps every 4–6 weeks—temporary relief.
Cryotherapy: Freezing follicles with nitrous oxide or liquid nitrogen; repeat freeze‑thaw cycles, 85–90 % effective.
Electroepilation or electrocautery: Destroys the follicle with an electric current—localized option.
Surgical excision: Removal of follicle-bearing area in select cases; requires anesthesia and ophthalmologist referral.

🛡️ Prognosis & Follow‑Up

Treated dogs generally recover well; new hairs may emerge, especially in young dogs or Shih‑Tzus.
Ongoing monitoring: watch for recurrence, monitor corneal health, and tear function.
Risks: Cryo/electro treatments may cause swelling, depigmentation, or scarring; repeated sessions may be needed.

✅ Dr Houston’s Clinical Tips

🔍 Always check eyelid margins in breeds predisposed to epiphora.
📸 Magnification is essential—asymptomatic dogs are often overlooked until corneal damage.
🍃 Use lubricants and epilation for mild cases; escalate to cryo/electro only when needed.
📅 Schedule re‑checks post‑procedure at 4–6 weeks and periodically thereafter.
🛠️ Refer to a veterinary ophthalmologist for surgical or complex cases.

If your dog is tearing excessively, squinting, or rubbing their eyes, request a thorough ophthalmic exam—even if eyelashes seem normal. Early diagnosis and targeted treatment help prevent corneal ulcers and preserve vision. 🐾❤️