What Can You Do For Cat Conjunctivitis

If you have noticed your cat squinting, pawing at their face, or displaying a red, swollen eye with discharge, they may be suffering from conjunctivitis. Often called "pink eye" in humans, this condition is one of the most common eye problems seen in veterinary clinics. While it can be alarming, most cases are manageable with prompt care. This guide explains what you can do for cat conjunctivitis, from safe home care to understanding when professional treatment is necessary.

Quick Q&A: Common Questions

Question: Can I use human eye drops for my cat's conjunctivitis?

Answer: Never use human eye drops, including those for "pink eye" or "red eye," on your cat. Products like Visine or antibiotic drops meant for humans can contain ingredients that are toxic to felines or may worsen the infection. Additionally, human formulations often treat viral or allergic causes, while feline conjunctivitis is frequently bacterial or viral, requiring specific veterinary diagnosis and medication.

Understanding Feline Conjunctivitis

Conjunctivitis is an inflammation of the conjunctiva, the thin, moist tissue that lines the eyelids and covers the front of the eyeball. When inflamed, this tissue becomes red, swollen, and may produce discharge. The condition is rarely an emergency but is always uncomfortable for your cat.

Common Causes

• Infectious agents: Feline herpesvirus (FHV-1) is the most common cause, responsible for up to 80% of cases. Calicivirus, chlamydia, and mycoplasma are also frequent culprits.
• Environmental irritants: Dust, smoke, pollen, or chemical fumes can trigger non-infectious conjunctivitis.
• Physical trauma: A scratch from another cat, a foreign object like a grass seed, or an ingrown eyelash can cause irritation.
• Allergies: While less common than in dogs, cats can develop allergic conjunctivitis from food or environmental triggers.

Recognizing the Signs

• Redness and swelling: The inner eyelids and the white of the eye appear pink or red.
• Discharge: Clear, watery discharge is often seen with allergies or viral infections. Thick, yellow, or green discharge suggests a bacterial component.
• Squinting or blinking: Your cat may hold their eye partially closed or blink rapidly.
• Pawing at the face: They may rub their eye with a paw or against furniture.
• Third eyelid protrusion: The nictitating membrane (the small, white "third eyelid" in the inner corner) may become visible and partially cover the eye.

What You Can Do For Cat Conjunctivitis at Home

Before you can begin specific treatment, you must first confirm your cat does not have a more serious condition like a corneal ulcer. If the eye is hazy, blue, or your cat is in obvious pain, skip home care and go directly to a vet.

Safe Eye Cleaning

Gentle cleaning is the most important thing you can do at home. It removes discharge and debris, keeps the eye moist, and prevents secondary infection.

• Use a sterile saline solution (not contact lens solution, which contains preservatives). You can buy this at a pharmacy or make a simple version by boiling water, cooling it, and adding 1/4 teaspoon of salt per cup.
• Dampen a soft, lint-free cloth or cotton ball. Use a fresh one for each eye to prevent cross-contamination.
• Wipe from the inner corner outward, gently removing any crust or discharge. Do not rub.
• Repeat 2 to 4 times daily until the eye looks clear.

Warm Compresses

A warm compress can soothe swelling and encourage drainage.

• Soak a clean cloth in warm (not hot) water, wring it out, and hold it gently over the closed eye for 5 to 10 minutes.
• Do this 2 to 3 times a day. Your cat may resist, so be patient and calm.

Environmental Adjustments

• Reduce irritants: Switch to unscented, low-dust cat litter. Avoid using candles, air fresheners, or cleaning sprays near your cat.
• Provide humidity: A cool-mist humidifier or placing a bowl of water near a heat source can help dry eyes.
• Keep them calm: Stress is a major trigger for feline herpesvirus flare-ups. Maintain a quiet, predictable routine.

What to Expect at the Vet

If home care does not improve the eye within 24 to 48 hours, or if the eye appears painful or cloudy, schedule a veterinary visit.

Diagnostic Process

Your vet will perform a thorough eye exam and may use a fluorescein stain to check for corneal ulcers. They will also look at the third eyelid and assess tear production. If a specific cause is suspected, they may take a swab for testing.

Common Treatments

• Topical antibiotics: Ophthalmic ointments or drops like Terramycin, Vetropolycin, or erythromycin are prescribed for bacterial infections.
• Antiviral medication: For herpesvirus, your vet may recommend oral L-lysine supplements or specific antiviral eye drops like cidofovir.
• Anti-inflammatories: In some cases, a short course of steroid drops is used, but only after a corneal ulcer has been ruled out.
• Oral antibiotics: If the infection is severe or systemic, oral medications may be needed.

Follow-Up Care

Most cases resolve within 1 to 2 weeks. You will need to apply eye medication 2 to 4 times daily for 7 to 10 days. Watch for improvement: the discharge should change from thick to clear, and the redness should fade.

Preventing Future Episodes

Conjunctivitis can be recurrent, especially in cats with chronic herpesvirus. Prevention focuses on reducing triggers.

• Support the immune system: Feed a high-quality diet rich in taurine and omega-3 fatty acids.
• Reduce stress: Use pheromone diffusers like Feliway and provide plenty of hiding spots and vertical space.
• Vaccinate: Ensure your cat is up to date on core vaccines, including those for feline herpesvirus and calicivirus.
• Avoid shared items: If you have multiple cats, do not share food bowls, water dishes, or bedding during an outbreak.

When to Seek Immediate Help

While conjunctivitis is rarely an emergency, some signs require immediate veterinary attention:

• The eye appears cloudy, blue, or hazy.
• Your cat is completely unable to open the eye.
• There is a visible foreign object or injury.
• Your cat is in obvious distress, crying out, or hiding.

In these cases, what you can do for cat conjunctivitis is limited to keeping your cat calm and getting to a vet as quickly as possible.