Cherry Eye in Cats: Third Eyelid Prolapse — Causes and Surgery Options

Oct 15 • 10 min read

You look at your cat's face and there it is a small pink lump sitting in the inner corner of one eye, like a tiny cherry tucked into the corner. It wasn't there yesterday. Your cat isn't acting sick, but that lump is not going anywhere on its own.

Cherry eye in cats is a prolapse of the tear gland inside the third eyelid. It shows up as a smooth pink or red bulge in the inner corner of the eye and is uncommon in cats compared to dogs, though Persian and Burmese cats are seen with it more often. Surgery to reposition the gland is the standard treatment, since the gland plays an important role in tear production.

Key Takeaways

Cherry eye is the everyday name for prolapse of the third eyelid gland, also called the nictitating membrane.
It is uncommon in cats, but Persian and Burmese cats are reported to be more prone to it.
The main sign is a pink or red rounded mass in the inner corner of one or both eyes.
A swollen third eyelid is not always cherry eye. Your vet needs to rule out conjunctivitis, a mass, or everted cartilage first.
Surgery to reposition and preserve the gland is the standard treatment. Removing the gland is usually avoided because it can lead to lifelong dry eye.
There is no way to prevent cherry eye at home, since it is tied to inherited tissue weakness, not day-to-day care.

What Is Cherry Eye in Cats?

Diagram showing the location of the third eyelid gland in a cat's eye

Cats have a third eyelid tucked into the inner corner of each eye, known as the nictitating membrane. This tissue helps protect the eye's surface, and it houses a gland that contributes a meaningful share of the tear film that keeps the eye moist and comfortable.

When the connective tissue holding that gland in place weakens, the gland can slip out of position and become visible as a rounded pink or red swelling. Pet parents often describe it as a bubble, a lump, or a small red cherry sitting in the corner of the eye. It can appear suddenly, and in some cats it may seem to come and go before settling into a permanent prolapse.

Cherry eye is uncommon in cats, especially compared with dogs, where it is a much more frequent problem. Even so, it does happen, and it is reported more often in Persian and Burmese cats. Because several other eye problems can look similar at a glance, any visible third eyelid or red mass should be checked by your vet rather than assumed to be cherry eye.

Signs Your Cat Might Have Cherry Eye

Illustration comparing a normal cat eye to one showing cherry eye third eyelid prolapse

Watch for the following signs, especially in the inner corner of the eye:

A pink or red rounded mass in the inner corner of one eye, sometimes both
A third eyelid that looks visibly swollen or raised
Watery, clear, or mucus-like eye discharge
Squinting, blinking more than usual, or holding the eye partly closed
Pawing at the eye or rubbing the face, which can make the irritation worse
Redness of the tissue around the eye, sometimes with mild secondary conjunctivitis
A dry-looking eye or thicker discharge if the gland has been prolapsed for a while

A classic cherry eye often looks dramatic, but the gland itself is not always very painful at first. The bigger long-term concern is ongoing exposure, inflammation, rubbing, and reduced tear support. See your vet promptly if you notice a new pink mass, squinting, or discharge. Treat it as an emergency if the eye looks cloudy, very red, very painful, suddenly swollen shut, or if your cat seems unable to see normally out of that eye.

What Causes Cherry Eye in Cats?

The usual underlying problem is weakness in the fibrous tissue that anchors the third eyelid gland in its normal position. When that tissue stretches or fails, the gland prolapses outward. In many cats, the exact reason for this weakness is not fully understood, but breed tendency suggests inherited anatomy plays a role, particularly in Persian and Burmese cats.

Inflammation can make the gland look larger and more obvious once it has already prolapsed. Rubbing, chronic irritation, and surface eye disease can also worsen the swelling over time. In some cases, what looks like cherry eye actually turns out to be something else entirely, such as everted third eyelid cartilage, conjunctival swelling, or a mass involving the third eyelid.

This distinction matters because treatment depends on the exact cause. A cat with a red lump in the corner of the eye needs a proper eye exam, not a guess based on appearance alone.

How Is Cherry Eye Diagnosed?

Diagnosis starts with a careful eye exam. Your vet will look closely at the third eyelid, cornea, conjunctiva, and tear film to confirm that the tissue protruding is truly the third eyelid gland and not a look-alike condition. Because cats hide eye pain well, this exam matters even when the eye does not seem severely uncomfortable at home.

Common tests include a fluorescein stain to check for a corneal ulcer, tonometry to measure pressure inside the eye, and a Schirmer tear test or similar tear assessment if dry eye is a concern. These tests help rule out glaucoma, ulcers, severe inflammation, and other conditions that would change the treatment plan.

In straightforward cases, advanced imaging is not usually needed. If the appearance is unusual, the prolapse keeps recurring, or your vet is concerned about a mass or structural abnormality, referral to a veterinary ophthalmologist is often the next step.

Treatment Options for Cherry Eye in Cats

Vets generally offer a spectrum of care, meaning there are treatment options at different price points depending on how urgent and how complicated your cat's case is.

Conservative care is best suited to cats with a very recent, mild, or intermittent prolapse, or as a short bridge while surgery is being arranged. This tier typically includes an eye exam, fluorescein stain testing as needed, lubricating eye medication, a short course of anti-inflammatory or antibiotic eye medication if there is secondary irritation, and an e-collar if your cat is rubbing the eye. This approach can offer short-term comfort, but true cherry eye rarely stays resolved long-term with medication alone.

Standard surgical repair is the most common approach for confirmed, persistent, or recurrent cherry eye. It typically includes a pre-op exam, general anesthesia, surgical gland replacement (commonly using a pocket-style technique that tucks the gland back into a newly created pocket of tissue), post-op pain control and eye medication, an e-collar, and a recheck visit about 7 to 14 days later. Outcomes are generally good to very good in uncomplicated cases, with most cats recovering well within one to two weeks, though mild swelling can persist briefly and recurrence is still possible.

Infographic comparing conservative, standard, and advanced treatment tiers for cherry eye in cats

Advanced or specialist care is recommended for recurrent prolapse, an uncertain diagnosis, brachycephalic cats with multiple eye issues, or pet parents who want specialist-level planning from the start. This includes a veterinary ophthalmologist consultation, expanded tear testing, specialist surgical repair for atypical or complex cases, and management of any concurrent corneal disease, dry eye, or third eyelid cartilage abnormalities.

Whichever tier applies to your cat, the underlying surgical philosophy stays the same across all of them: preserve the gland rather than remove it. Gland removal is generally avoided because the gland contributes meaningfully to tear production, and its loss can lead to chronic dry eye, known as keratoconjunctivitis sicca, which requires lifelong management.

"Preserving the gland whenever possible... surgical replacement supports long-term tear production better than removal." — SpectrumCare, Cherry Eye in Cats

Can Cherry Eye Be Prevented?

There is no reliable way to prevent cherry eye when the main issue is inherited or structural weakness in the tissue holding the gland in place. Supplements, home remedies, and over-the-counter eye products will not stop the gland from prolapsing.

What you can do is reduce secondary irritation and catch problems early. Keep your cat from rubbing the affected eye, avoid using human eye medications or leftover drops unless your vet specifically tells you to, and have any new eye changes checked promptly. Early evaluation can help limit inflammation and protect tear function while you and your vet decide on the right treatment path.

If your cat is a Persian, Burmese, or another flat-faced breed with ongoing eye concerns, regular eye checks are worthwhile, since these breeds can sometimes have more than one eyelid or surface-eye issue happening together.

Is a Swollen Third Eyelid Always Cherry Eye?

Not necessarily. A raised or swollen third eyelid can also be a sign of conjunctivitis, a corneal ulcer, a mass, everted cartilage, or even a systemic illness that causes the eye to sit slightly further back in the socket. That is exactly why a lump in the corner of the eye deserves a proper veterinary exam rather than an assumption. Your vet will use simple, painless tests, like eye pressure checks and dye staining, to separate true cherry eye from its look-alikes before recommending a treatment plan.

What Happens If Cherry Eye Is Left Untreated?

An untreated prolapsed gland stays chronically exposed to air, dust, and rubbing. Over time, this ongoing exposure tends to make the gland more swollen, more irritated, and sometimes secondarily infected. The bigger long-term risk is reduced tear production from the damaged gland, which raises the chances of dry eye developing later. Dry eye is uncomfortable and needs lifelong medical management, which is why most vets recommend addressing a confirmed cherry eye rather than waiting to see if it resolves on its own.

Caring for Your Cat After Cherry Eye Surgery

Recovery from cherry eye surgery is usually straightforward, and most cats do very well with a bit of extra attention at home. A few things help the process go smoothly:

Keep the e-collar on for the full period your vet recommends, even if your cat seems annoyed by it, since rubbing is the most common cause of a repeat prolapse
Give all prescribed eye medications for the full course, even once the eye looks normal again
Keep the recheck appointment, usually scheduled 7 to 14 days after surgery
Watch for any new swelling, discharge, or squinting and report it to your vet promptly rather than waiting
Keep your cat calm and indoors during the healing period to avoid dust, scratching, or fights that could disturb the surgical site

A soothing lubricating eye drop can help keep the eye comfortable during the healing window, while an antibiotic and anti-inflammatory combination drop supports the surgical site if your vet has prescribed one.

FAQ Section

Is cherry eye painful for cats?
Cherry eye itself is usually not very painful in the early stages, but the exposed gland can become irritated, dry, and inflamed the longer it stays out of place. Left untreated, ongoing exposure raises the risk of secondary problems like conjunctivitis and reduced tear production, which can become genuinely uncomfortable over time.

Does cherry eye in cats go away on its own?
No. True cherry eye caused by weakened connective tissue does not resolve on its own and will not disappear with home care. It may look like it comes and goes at first, but it typically settles into a permanent prolapse that needs veterinary treatment, usually surgery, to correct.

How much does cherry eye surgery cost for a cat?
Costs vary by clinic, location, and how complicated the case is. Conservative medical support to stabilize the eye is generally the lowest cost option, routine surgical repair at a general practice sits in the middle range, and referral to a veterinary ophthalmologist for recurrent or complex cases costs more. Your vet can give you an exact estimate after examining your cat's eye.

Which cat breeds are most likely to get cherry eye?
Cherry eye is uncommon in cats overall, but it is reported more often in Persian and Burmese cats. Any cat can develop it, but if you have one of these breeds, it is worth learning what a normal inner eye corner looks like so you can catch a new lump early.

Why do vets prefer repairing the gland instead of removing it?
The third eyelid gland contributes a meaningful share of your cat's tear film. Removing it instead of repositioning it can lower long-term tear production and increase the risk of dry eye, a lifelong condition that needs daily medication. Repositioning the gland preserves its function while still correcting the visible prolapse.