Overview: Understanding Cherry Eye

Cherry eye, medically referred to as a prolapse of the gland of the nictitating membrane, is a common ophthalmic condition in domestic pets. While many owners associate this with Otitis Externa (Ear Infection) due to generalized inflammation in some breeds, it is distinctively an issue involving the third eyelid. According to the American College of Veterinary Ophthalmologists, the third eyelid contains a specialized gland responsible for producing a significant portion of the aqueous (watery) part of the tear film. When the connective tissue that anchors this gland to the orbital rim weakens, the gland 'pops out,' becoming visible as a red, fleshy mass in the corner of the eye. If left untreated, the exposed gland can become inflamed, dry, or damaged, potentially mimicking the secondary ocular irritation often seen in patients with Diabetes Mellitus.

Causes & Risk Factors

While the exact etiology remains idiopathic in many cases, veterinarians note that breed predisposition plays a significant role. Per the Merck Veterinary Manual, younger animals—specifically those under two years of age—are most frequently affected. Brachycephalic (short-nosed) breeds are at the highest risk. Common breeds include Bulldogs, Beagles, Shih Tzus, and Cocker Spaniels. In cats, the condition is much rarer, as noted in reports by Cornell University College of Veterinary Medicine, and often suggests an underlying localized trauma or inflammatory process rather than a genetic congenital weakness.

Signs & Symptoms

Identifying cherry eye is often straightforward due to its visual appearance. Owners typically observe a pink or reddish, smooth, oval-shaped mass protruding from the medial canthus (the inner corner) of the eye. As described by the American Animal Hospital Association (AAHA), additional symptoms may include:

  • Excessive tearing or mucoid discharge

  • Squinting or blepharospasm (involuntary eyelid twitching)

  • Ocular redness and inflammation of the conjunctiva

  • Secondary corneal irritation

It is vital to differentiate this from other conditions, such as Dental Periodontal Disease, which can sometimes cause localized swelling or systemic issues that manifest in the head region. If a pet appears lethargic or displays neurological signs, these should not be attributed to cherry eye alone.

Diagnosis

Diagnosis is generally performed through a clinical examination by a primary care veterinarian or a board-certified veterinary ophthalmologist. As highlighted by VCA Animal Hospitals, the veterinarian will assess the eye to rule out other ocular surface diseases. They may perform a Schirmer tear test to evaluate tear production, as the prolapsed gland is often less efficient at producing the necessary components for a healthy tear film. Because systemic conditions like Giardia or severe parasitic infestations like Roundworm Infection can sometimes impact an animal's general health, a physical exam will often check for overall systemic wellness to ensure the patient is a safe candidate for anesthesia.

Treatment & Management

Treatment primarily focuses on the surgical replacement of the gland. Historically, surgeons used to remove the gland entirely, but as noted by the Journal of the American Veterinary Medical Association (JAVMA), this is now strongly discouraged. Removal of the gland can lead to keratoconjunctivitis sicca (KCS), or 'dry eye,' which requires lifelong medical management.

Modern techniques utilize an 'imbrication' or 'pocket' procedure. The surgeon creates a small pocket in the conjunctival tissue, tucks the gland back into its anatomical position, and sutures it in place. Success rates are high, though some patients may require multiple procedures if the sutures dissolve too quickly or if the tissue remains prone to prolapse.

Recovery & Aftercare

Post-operative care is critical for the success of the repair. Owners should expect the following:

  • E-Collar Usage: A protective Elizabethan collar is mandatory to prevent the pet from rubbing the eye and tearing the new sutures.

  • Medication Compliance: Antibiotic and anti-inflammatory eye drops are typically prescribed to prevent infection and reduce swelling.

  • Activity Restriction: Limiting physical exertion for 10–14 days is necessary to ensure the site heals without pressure increases.

While some owners turn to Krill Oil Supplement to support general ocular health, these should only be used post-recovery and with veterinary approval to ensure they do not interfere with prescribed ocular medications.

Cost Considerations

Costs vary significantly based on geographic location, the experience of the surgeon, and whether the repair is performed by a general practitioner or a specialist. According to PetMD, owners should budget for pre-surgical blood work, the surgical fee, anesthesia monitoring, and post-operative medications. It is often a significant investment, but essential for preserving the long-term health of the eye.

When to Contact a Vet

Contact your veterinarian immediately if you notice a mass in the corner of your pet’s eye. Early intervention is key. If the gland is left exposed for too long, the risk of tissue damage and chronic inflammation increases. If your pet is also suffering from unrelated issues, such as Hookworm Infection, coordinate with your vet to ensure the surgery timing is safe given the pet's concurrent health status.