A tear is not just water. It is three layers laid over the eye like a windshield with washer fluid, wiper and a film of oil to stop it drying: a watery middle, a sticky inner layer that holds it on, and an oily outer layer that stops it evaporating. Dry eye is what happens when that film stops doing its job, and in this breed it usually arrives quietly in middle age rather than overnight. The hardest part for owners is that it looks like an infection, gets treated like one, and keeps coming back, because the thing that is actually missing was never in the bottle.
A sore, squinting or cloudy eye, or any change in vision, needs prompt veterinary attention. Dry eye and corneal ulcers often occur together. An examination and tear testing guide treatment. Do not rely on a photograph or on the color of the discharge.
“My five year old English Bulldog rescue has a white film creeping over both eyes with visible blood vessels in it, and I think his sight is going. He has been on eye drops for conjunctivitis twice this year and it keeps coming back. Please advise.”
The detail that tells the story is the part you probably thought was background: treated twice for conjunctivitis, better for a while, then back. That pattern, in an English Bulldog of that age, is dry eye until proven otherwise. A course of drops calms the surface for as long as it is going in, then the underlying problem, which is a tear film that is not protecting the eye, carries on where it left off.
The white film with blood vessels running through it is the cornea defending itself. Faced with a surface that is chronically dry and inflamed, it grows vessels in and lays down pigment and scar tissue. That is why the sight fades. It is also why I would not wait: the vessels and the pigment are the eye telling you how long this has been going on, and some of that change does not reverse.
What I would ask for at the next visit, by name, is a Schirmer tear test and a fluorescein stain on both eyes. The first measures how much tear is being made, the second checks whether the surface is already ulcerated, and the answer to the second changes what can safely be put in the eye. Asking for both by name is reasonable and any veterinarian will be glad you did.
Introduction to Bulldog and French Bulldog Dry Eye (KCS)
Keratoconjunctivitis Sicca (KCS), or “Dry Eye,” is a common ophthalmic condition in bulldogs and French bulldogs. It is characterized by chronic inflammation of the:
- Ocular surface
- Conjunctiva (the pink tissue around the eye)
- Cornea (the clear, outermost part of the eye)
- Sclera (the white part of the eye)
Insufficient tears leave the eye surface dry and inflamed, causing discomfort and potentially affecting vision.
Bulldog Dry Eye: 5 Things to Know
- Bulldog dry eye is due to a decrease in tear production, mostly due to an autoimmune disease
- Schirmer Tear Test is the gold standard to help diagnose Keratoconjunctivitis Sicca (KCS)
- KCS can lead to cornea ulcers and sight loss
- Dry eye is usually managed with a combination of topical ophthalmic medications, long term
- Prescribed eye medication and rechecks are central to KCS care. Supplements and tear-stain products do not replace them.
An Ounce of Prevention is Worth a Pound of Cure
A normal test does not always mean a normal tear film
Two things about this condition in our breeds are not widely said, and both change what you should expect from a visit.
The first is that this is not a puppy problem. In the largest study of dogs in general practice, the middle age at which dry eye was first diagnosed was around seven and a half years. English Bulldogs sit far above every ordinary breed for it, with roughly one in fifty affected in a single year against about one in two hundred and fifty dogs overall. So if you have a Bulldog heading into middle age with a recurring eye, the odds are not neutral. Ask for the tear test before anyone reaches for another course of drops.
The second is the one that catches people out. A normal tear test does not always mean a normal tear film. The Schirmer strip measures only the watery part of the tear. It cannot see the oily layer that stops the tear evaporating, and in a flat faced dog that oily layer is often the part that is failing. When French Bulldogs were measured properly against ordinary dogs, they produced slightly MORE watery tear, and yet their tear film broke apart in about half the time, because the little glands along the lid margin that supply the oil were thinned out. A strip that reads normal in that dog is telling the truth about the wrong thing.
So if your dog has the signs and the test comes back normal, that is not the end of the conversation. It means the dryness is a quality problem rather than a quantity one, and it is worth saying so out loud to your veterinarian rather than going home reassured.
What is Bulldog KCS (Dry Eye)?
KCS (Keratoconjunctivitis Sicca) is a condition that causes chronic dryness and inflammation of the eye’s surface, including the conjunctiva (the membrane covering the eye) and the cornea (the clear outer layer).
➡️ It is less common in French Bulldog and English Bulldog puppies and more common in adult and senior bulldogs
➡️ Bulldog dry eye often affects both eyes, but it may start in one eye and later develop in the other.
What is the Tear Film in Bulldogs and French Bulldogs?
Your bulldog’s tear film is essential for maintaining eye health and comfort. It consists of three layers, each with a crucial function:
➡️ MUCIN Layer (Inner Layer): Helps stick tears to the cornea, ensuring even distribution.
➡️ LIPID Layer (Outer Layer): A thin, oily layer that prevents tear evaporation and maintains moisture.
➡️ AQUEOUS Layer (Middle Layer): The watery component of tears.
🚨Disruptions in any of these layers can lead to bulldog dry eye (KCS), causing discomfort and potential vision problems.
The tear film contains vital nutrients and provides essential lubrication to protect the cornea.
What Causes Dry Eyes KCS in Bulldogs and French Bulldogs?
The dryness is usually due to reduced tear production, although in flat faced breeds the quality of the tear film matters as much as the quantity.
#1. IMMUNE MEDIATED KCS
In bulldogs and French bulldogs, dry eye is most often an immune-mediated disease (autoimmune).
#2. KCS OTHER CAUSE:
- TRAUMA: Trauma to the bulldog’s eye, skull, or orbit.
- NEUROLOGIC CAUSE: An injury to your bulldog’s cranial nerve 7 (facial nerve paralysis) or CN5 (trigeminal nerve).
- DRUG INDUCED: (Sulfa Drugs, see “tips & warnings”).
- HORMONAL DISEASE: Such as Bulldog Hypothyroidism.
- CHERRY EYE REMOVAL: A prolapsed gland should be put back, not taken out. Removing it takes away a source of tears.
Inadequate tear production and a dry ocular surface may lead to:
- Painful corneal inflammation
- corneal scarring
- corneal ulcers
- vision impairment.
BULLDOG KCS CHERRY EYE WARNING 🚨
The gland of the third eyelid (nictitating membrane) contributes to tear production. Cherry eye means this gland has prolapsed. Surgical correction should preserve and reposition the gland when possible.
⚠️ Removing that gland raises the long term risk of dry eye, or makes an existing dry eye worse.
Dry Eyes KCS Symptoms in Bulldogs and French Bulldogs:
Most bulldogs with KCS present with a history of chronic, recurrent, nonspecific keratoconjunctivitis.
Here is a list of the most common findings noted with bully dry eye:
➡️ DISCHARGE: Thick, ropy, often yellow-gray discharge that keeps coming back
➡️ REDNESS: Red injected conjunctiva and sclera
➡️ FOGGY CORNEA: Discolored, pigmented, vascular, and fibrotic cornea (should be clear)
➡️ INFECTION: Dry eye can break down the corneal protective barriers, thus predisposing your bulldog to secondary bacterial conjunctivitis.
➡️ BLINDNESS: Partial or complete loss of vision.
Low tear production leads to corneal hypoxia and corneal dehydration.
Diagnosing Bulldog Dry Eye (KCS)
A straightforward tear production test called the Schirmer Tear Test is used to measure your bulldog’s quantitative tear production.
#1 Schirmer Tear Test
AQUEOUS / QUANTITATIVE: This test assesses the aqueous (watery) component of the tear film, which is the only part measured.
MUCIN / QUALITATIVE: The mucin and lipid layers, which contribute to tear quality and stability, are not evaluated by this test.
The Schirmer Tear Test is a quick and simple way to measure tear production. A narrow strip of paper is placed in the eye for 1 minute, absorbing tears.
💧 The more blue on the strip, the better the tear production.
Interpreting the Results:
✅ Normal: ≥ 20 mm wetting per minute
⚠️ Early KCS: 15-19 mm wetting per minute
⚠️ Mild KCS: 11-14 mm wetting per minute
⚠️ Moderate KCS: 6-10 mm wetting per minute
❌ Severe KCS: 5 mm or less wetting per minute
⚠️ KCS Diagnosis Warning
In the early stages of your bulldog’s dry eye (KCS), mucin and lipid production may be low, while aqueous tear production can still appear normal. The Schirmer Tear Test only measures the aqueous component, meaning results may falsely appear “normal” even when clinical signs suggest bulldog KCS.
🩺 Before diagnosing and starting treatment, an experienced bulldog veterinarian will weigh three things together:
- all three layers of the tear film, not only the watery one
- what the eye actually looks like and how it has behaved over time
- the breed in front of them, because the risk is not the same in every dog
#2. Cornea Fluorescein Stain Test
Your veterinarian will perform a fluorescein stain test to check for an active corneal ulcer.
- A special fluorescein dye is applied to your bulldog’s cornea.
- The eye is then examined under a UV light in a dark room.
- Any damaged or ulcerated areas will glow green, confirming the presence of an ulcer.
This test is essential for finding corneal injuries, which are common in bulldogs because the eye sits forward and is less protected
Twelve weeks before you call it a failure
Before the list of medicines, the single thing that decides how this goes, and it is not which drug you are given.
It is whether you keep going long enough to judge it. Cyclosporine, the mainstay, is unusual in veterinary medicine in having a proper randomized trial behind it, and roughly four dogs in five improve. But some of that gain shows in the first week, the full effect takes six weeks or more, and the people who know this best say you should not call it a failure until about twelve weeks of consistent use. Owners abandon it at three or four weeks because the eye is only a little better, and then conclude the drug did not work. What did not work was the length of the course.
Starting earlier gives you a better dog. The response is far better when there is still some tear production left to rescue than when the gland has already gone quiet. That is the entire argument for testing early rather than treating another presumed infection, and it is the reason I keep pushing the tear test in front of owners who have been handed antibiotic drops twice.
And the part nobody enjoys hearing: this is managed, not cured. In the registration trial, essentially every eye slid back when the drops stopped. The manufacturer eventually changed the wording on the label from treatment to management, which tells you everything. So when the eye looks good, that is the treatment working, not the problem being over. Stopping because it looks better is the most common way a well controlled dry eye becomes a scarred one.
Preventing & Treating Bulldog and French Bulldog Dry Eye (KCS)
✔️ Step-by-step Care Guide:
➡️ REMOVE MUCUS: Ask your veterinarian to demonstrate gentle cleaning and select an eye-safe product. Do not rub the cornea or put skin fold wipes into the eye.
➡️ MEDICATIONS
💊 IMMUNE SUPPRESSANTS: Topical ophthalmic ointments or drops like
- Cyclosporine
- Tacrolimus
These are the mainstay. They work by calming the immune attack on the tear gland, and they need a prescription.
💊ANTI-INFLAMMATORY: Medications such as
- ophthalmic hydrocortisone
- dexamethasone
These reduce inflammation, and they must never go into an eye with an active ulcer. See the steroid warning below.
💊 ANTIBIOTICS: Short-term topical antibiotics may be required in cases of infection.
💊 LUBRICANTS: Lubricants add comfort and a little surface protection. Products containing hyaluronic acid hold moisture on the eye longer than plain saline, and there is reasonable evidence for that, but a lubricant supports treatment rather than replacing it.
⚠️ Important Steroid Caution in Bulldog Dry Eye Treatment
🚨Ophthalmic steroids help reduce KCS inflammation but can worsen an active corneal ulcer.
🚨Before using any dry eye medication containing steroids, your vet should always perform a corneal stain test to rule out ulcers.
🚨Using steroids without confirming the absence of an ulcer can lead to delayed healing, corneal thinning, and worsening of the condition.
Dr. Kraemer’s Bulldog & French Bulldog Dry Eye Rule of Thumb
🩺Lifelong Treatment: To protect your bulldog’s cornea, prevent vision loss, and manage discomfort, KCS usually requires long-term, often lifelong treatment. Follow your veterinarian’s schedule and rechecks.
🩺Tear Testing Tip: Always test your bulldog’s tear production whenever they experience an eye problem, especially if a corneal issue is suspected.
Caught early, while there is still some tear production left to rescue, this is a far more manageable condition.
Let me be plain, because this is a page where it matters. There is no eye drop, eye rinse or eye supplement anywhere in my store. Dry eye is treated with prescription medication that your veterinarian chooses after testing the eye, and nothing on a shelf replaces that. If a site offers you something to pour into a dry eye, be careful.
What the range is for is the face around the eye, which on this condition is doing real work. A dog with dry eye produces thick discharge, and that discharge sits in the fur under the eye and in the nasal fold right beside it, where it keeps the skin wet and sore. The Tear StainLess XL Wipes are for that fur, and the Small Antiseptic Wipes suit the tight fold next to the eye. These are used alongside what your veterinarian prescribes, not instead of it, and neither goes anywhere near the eye itself. Your vet will tell you which cleanser is safe that close to the cornea.
Two supplements are worth a mention for honest reasons rather than clever ones. Dry eye in this breed is usually immune driven, so the Immune Support Plus Chews may help as general support, and since the oily layer of the tear film is the part that fails in flat faced dogs, the Fish Oil EFA Chews may help with that side of things. Neither treats dry eye. Whether either suits your dog is a conversation for your veterinarian, particularly if he is already on medication. Bundle & save
Dry Eyes in Bulldogs and French Bulldogs: KCS Tips & Warnings
Below are selected tips and warnings from Dr. Kraemer.
#1 🩺 Bulldog Dry Eye OTC Ophthalmic Lubricants Tip :
Over-the-counter lubricants and irrigating eye drops can be used in addition to prescription treatments but should not replace them.
Preferred Option: Lubricants containing hyaluronic acid, which stay on the surface longer than plain drops.
#2 🩺 Bulldog KCS Eye RX Tip:
Cost Awareness: Some prescription dry eye drops are expensive, so do not waste them. One drop per eye is enough. More does not work better, it runs down the face.
💧 Drops vs. Ointments:
- ✔️ Preferred: Drops: easier to apply and control.
- ❌ Ointments: Pressurized tubes can be difficult to manage and may lead to overuse.
#3 🩺 Bulldog and French Bulldog Ophthalmic Rinse Tip:
Clean first, for best results.
Follow your veterinarian’s cleaning instructions before applying the prescribed drops. Use only the recommended eye-safe cleanser; skin wipes and tear-stain wipes are not interchangeable with ophthalmic products.
#4 🩺Bulldog and French Bulldog Cherry Eye Tip:
Surgical Recommendation: Surgically correct your bulldog puppy’s cherry eye as soon as possible.
Delaying surgery can lead to chronic corneal irritation, discomfort, and potential long-term eye complications.
✅ Dealing with it early is generally kinder and simpler than dealing with it late.
#5 🩺 Bulldog KCS Autoimmune Disease Tip
Immune-mediated disease is a common cause of KCS, but your veterinarian should assess other possible causes.
#1⚠️ Bulldog Cherry Eye Warning:
Do NOT remove the gland! Surgically removing your bulldog puppy’s cherry eye can lead to bulldog dry eye (KCS) because the gland contributes to aqueous tear production.
Instead, corrective surgery is recommended to reposition the gland and preserve tear function, reducing the risk of lifelong dry eye disease.
#2⚠️ Bulldog Dry Eye Steroid Warning:
Do NOT use ophthalmic steroids on an active corneal ulcer. They delay healing and can make the ulcer deeper.
Always consult your veterinarian before using steroid-containing eye medications to ensure they are safe for your bulldog’s specific eye condition.
#3⚠️ Dry Eye Commitment to Treatment Warning:
Stopping or neglecting treatment may lead to:
- Progressive corneal damage
- Chronic pain & discomfort
- Frequent infections
- Impaired or complete vision loss
✅ Most dogs with KCS need ongoing treatment. Do not stop prescribed drops without a veterinary recheck.
#4⚠️ Sulfa RX Causing Bulldog KCS Warning:
Sulfa drugs can induce dry eye (KCS) and should be prescribed with caution or avoided when possible.
If prescribed:
- Check tear production before starting treatment.
- Recheck tear production after 5 days to monitor any adverse effects.
✅ Checking early, rather than after a long course, is how you avoid finding out too late.
#5⚠️ Car Open Windows and KCS Warning:
Do NOT let your bulldog ride with his head out of the car window 🚗. It dries the surface of the eye and exposes it to grit and wind.
If you allow it, use protective goggles to shield their eyes from dust, dirt, and potential trauma. Safety first!
#6⚠️ Antihistamines and Dry Eyes Risks Warning:
Antihistamines like Benadryl can reduce tear production, potentially worsening bulldog dry eye (KCS).
Use with caution, especially in bulldogs already prone to dry eye. If needed, monitor tear production and consult your vet for safer alternatives.
#7⚠️ Visine and Bulldog Dry Eye Warning:
Do not choose human redness-relief drops for your bulldog without veterinary advice. Products sold under one brand can contain different ingredients; ask your veterinarian to approve the exact formulation.
Instead, use a lubricant your veterinarian has approved, preferably one containing hyaluronic acid.
#8⚠️ French Bulldogs and Bulldogs Opposite Eye Warning:
If one eye develops dry eye (KCS), the other is at high risk of developing tear deficiency over time.
Regular Monitoring: Even if only one eye is affected, the other eye should be checked frequently to catch early signs and start treatment if needed.
#9 ⚠️ Bulldog Corneal Ulcer Testing Warning:
- Schirmer Tear Test (STT): Measures tear production to diagnose dry eye (KCS).
- Cornea Staining Test: Detects corneal ulcers, which can be missed if only the STT is performed.
✅ Ask for both tests together. One without the other leaves half the eye unexamined.
#10⚠️ Bacterial Conjunctivitis Misdiagnosis Warning
Some veterinarians mistakenly diagnose bulldog dry eye (KCS) as bacterial conjunctivitis, leading to incorrect treatment.
- A misdiagnosis can create a false sense of security
- Delays proper treatment, allowing the condition to worsen
- Untreated dry eye can lead to blindness
Prevent Misdiagnosis:
- Always request a Schirmer Tear Test (STT) and Corneal Stain Test when your bulldog has eye redness, discharge, or irritation.
- Work with an experienced bulldog veterinarian to ensure accurate diagnosis and appropriate treatment.
The tear test came back normal but his eye is still sore. What now?
He keeps being treated for conjunctivitis and it keeps coming back.
How long before the drops work? It has been three weeks and I see almost nothing.
Will this go away, or is he on drops forever?
Can I use human eye drops from the pharmacy?
Only one eye is affected. Should I worry about the other one?
Is there anything in your store for dry eye?
More Help from Dr. Kraemer
- Corneal ulcers in Bulldogs and French Bulldogs
- Cherry eye in Bulldogs and French Bulldogs
- Entropion in Bulldogs and Bulldog puppies
- Tear stains in Bulldogs and French Bulldogs
- Abnormal eyelashes and corneal ulcers
About the Author
Roy Kraemer, DVM, is a veterinarian with extensive clinical experience caring for Bulldogs and French Bulldogs. His educational work emphasizes prevention, early recognition, appropriate at-home care, responsible medication use, and veterinary evaluation when disease is persistent or severe.
Trusted by Vets ~ Recommended by Owners ~ Approved by Bulldogs
Shop the Tear StainLess XL Wipes →
References
- O’Neill DG, Brodbelt DC, Keddy A, Church DB, Sanchez RF. Keratoconjunctivitis sicca in dogs under primary veterinary care in the UK, an epidemiological study. Journal of Small Animal Practice
- Spornberger J, Soukup P, Meyer-Lindenberg A, Allgoewer I. Tear film characteristics in French bulldogs versus non-brachycephalic dogs. Frontiers in Veterinary Science
- Best LJ, Hendrix DVH, Ward DA. Diagnosis and Treatment of Keratoconjunctivitis Sicca in Dogs. Today’s Veterinary Practice
- American College of Veterinary Ophthalmologists. Dry Eye, Keratoconjunctivitis sicca
- Merck Veterinary Manual. Tear Stimulants and Immunosuppressants in Animals
To be clear: supplements or topicals are not substitutes for prescribed treatment. If your dog is unwell, is being treated for a condition, or is already on medication, review any supplement or topical with your veterinarian so it fits the plan you are already following. This page is educational and is not a diagnosis or a treatment plan for your own dog.
