Learn more about extra eyelashes in dogs
Distichiasis or Ectopic Cilia are one or several hairs that grow abnormally through the conjunctiva (the pink part of the eye) and come into contact with the surface of the eye (cornea). The offending hairs rub against the cornea, often causing intense pain and corneal ulcers.
The exact cause of this condition is unknown, but it is thought to be inherited. Breeds more commonly affected include the American Cocker Spaniel, Cavalier King Charles Spaniel, Shih Tzu, Lhasa Apso, Dachshund, Shetland Sheepdog, Golden Retriever, Chesapeake Retriever, Bulldog, Boston Terrier, Pug, Boxer, and Pekingese.
Written by Dr. Mariella Roberts, Veterinary Surgeon, Animal Trust Vets CIC | Published June 2025 | Review date June 2027 | This advice is for UK pets only and is not a replacement for seeing a vet
Symptoms
Excessive tears
Blinking/ squinting
Redness/inflammation
Discharge
Paw/rub the eye
Corneal opacity (possible ulcer)
You may see extra eye lashes if you look carefully
When to contact your vet
The eye is a delicate structure that can deteriorate quickly, so if you notice any of the above symptoms, it’s always best to book an appointment.
Diagnosis
Distichiasis is usually diagnosed by identifying lashes emerging from the eyelid or by observing lashes that touch the cornea or the conjunctival lining of the affected eye. A thorough eye examination is usually necessary, which can require sedation or anaesthetic. Your vet may also want to check if the eye is producing enough tears and put an orange dye in the eye to check that the surface is not damaged.
Treating Ectopic Cilia in dogs
Dogs that are not experiencing clinical signs may require no treatment at all.
Dogs with mild clinical signs may be managed medically, using eye lubricants to protect the cornea and coat the lashes with a lubricant film.
If your dog develops corneal ulcers from the distichiae or if your dog continues to rub or paw at their face, indicating that the condition is irritating, then other options, including surgery, may be suggested.
Complications associated with the surgery may include excessive scarring of the eyelids. Regrowth of the hair may also occur, which would then require repeated surgery.
Prevention
Sadly, it is not possible to prevent this condition, but it is recommended to avoid breeding dogs with distichiasis to reduce the incidence in future generations. Additionally, early treatment can prevent eye damage.
Outlook
The outlook is excellent for dogs that do not show any clinical signs associated with their distichiae. For dogs with mild clinical signs, the likelihood that the condition can be managed with medical treatment is good. In these cases, it is important to administer all medication and return for follow-up examinations as directed by your vet.
The outlook for surgical correction of this condition is also generally good. Following surgery, post-operation rechecks are necessary for several months to monitor for regrowth of the eyelashes.