Cherry Eye (Prolapsed Third Eyelid Gland) in Dogs
A red, swollen mass in the corner of your dog's eye is likely cherry eye. Surgical replacement preserves tear production and prevents dry eye.
Cherry eye is the common name for prolapse of the nictitans gland — the tear-producing gland normally hidden behind the third eyelid. When the ligament holding it in place weakens, the gland pops out and becomes visible as a red, cherry-like mass in the inner corner of the eye.
Key Points
- Cherry eye most commonly affects dogs under 2 years old
- Breeds at risk include Bulldogs, Beagles, Cocker Spaniels, and Shih Tzus
- The prolapsed gland must be surgically replaced, not removed
- Removing the gland causes permanent dry eye (keratoconjunctivitis sicca)
- Both eyes are often affected, sometimes months apart
- Untreated cherry eye becomes irritated, inflamed, and may bleed
Why Cherry Eye Occurs
The nictitans gland produces approximately 30% of the eye's tears. It's held in place by connective tissue that can weaken due to genetic factors. Brachycephalic breeds with prominent eyes are especially prone. The gland pops out from behind the third eyelid, becoming exposed to air and irritation. Environmental factors and inflammation may contribute.
Identifying Cherry Eye
You'll see a smooth, oval, pink-red mass in the inner corner of the eye, usually at the 3 or 9 o'clock position. It may appear suddenly after play, coughing, or excitement. The eye may water more than usual. Some dogs rub or paw at the eye. If irritated, the gland becomes swollen and may bleed slightly. It should not be confused with conjunctivitis or a tumor.
Surgical Treatment
The standard treatment is the Morgan pocket technique — the gland is tucked back into a surgically created pocket in the third eyelid and sutured in place. This preserves tear production. Gland removal is strongly discouraged because it leads to dry eye requiring lifelong medication. Both eyes may need treatment if the second gland prolapses later. Surgery is typically performed by a general veterinarian.
Aftercare & Prevention
Post-surgical care includes an e-collar for 2 weeks, antibiotic drops, and anti-inflammatory medication. Most dogs heal completely within 2-3 weeks. The recurrence rate is low with proper technique. There's no way to prevent cherry eye in predisposed breeds, but treating it early prevents chronic irritation and secondary complications. Regular eye checks help catch problems early.
When to See a Vet Immediately
- You notice a red mass in the inner corner of your dog's eye
- The third eyelid appears swollen or protruding
- Your dog is rubbing their eye frequently
- The eye is tearing more than usual
- The mass appeared suddenly
How RVC Can Help
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.