A little crust keeps returning to the corner of your cat’s eye. One eye looks watery, or your cat holds it half closed while waiting for breakfast. You may wonder whether a gentle wipe will take care of it or something more is going on.
Cat eye infections can cause redness, swelling, discharge, and squinting. Viruses and bacteria are common causes, but an injury or another eye condition can look much the same. Treatment may involve antibiotic eye medication, antivirals, or care for a damaged eye surface.
Contact your veterinarian promptly about a new eye problem. Pain, cloudiness, an injury, or a sudden change in vision calls for urgent care.
Signs Your Cat’s Eye Needs Attention
Changes can be subtle at first. Watch for:
- Repeated squinting, blinking, or holding an eye closed.
- Tears that keep wetting the fur below the eye.
- Sticky discharge or crust that returns after cleaning.
- Red, swollen tissue around the eye or inside the eyelids.
- Pawing at the face or rubbing it against furniture.
- A third eyelid that stays visible while your cat is awake.
The third eyelid is the pale membrane near the inner corner of the eye. When it becomes more noticeable, it can signal discomfort or another health problem.
Cat eye discharge may be clear and watery, thick and stringy, or yellowish green. Its color alone cannot tell you which germ is involved or which medication will help. Clear discharge does not rule out a painful eye problem, either.
Sneezing, a runny nose, and a reduced appetite may accompany a respiratory infection. Mention those changes when you call the clinic, even when the eye seems to be the main concern.
When to Seek Urgent Veterinary Care
Call your vet as soon as you notice new redness, swelling, or recurring discharge. Squinting or keeping an eye closed suggests discomfort and warrants prompt assessment, ideally the same day. Ask about urgent care if your regular clinic cannot see your cat.
Seek emergency care for any of these changes:
- Sudden cloudiness or a blue-white haze over the eye.
- A visible injury, blood, a bulging eye, or something stuck in the eye.
- Sudden trouble seeing, bumping into objects, or newly unequal pupils.
- Chemical exposure or severe, rapidly worsening eye pain.
These signs can occur with conditions that threaten sight. Do not wait for discharge to appear before seeking help.
A cat that is also struggling to breathe, extremely weak, or unable to eat needs urgent attention beyond the eye problem itself.
What Causes Cat Eye Infections?
Many eye infections involve the conjunctiva, the thin tissue lining the eyelids and covering the white of the eye. Inflammation of this tissue is called conjunctivitis in cats, sometimes described as cat pink eye.
Conjunctivitis tells you where the inflammation is. An examination helps establish why it is happening.
Feline herpesvirus and other respiratory infections
Feline herpesvirus type 1, or FHV-1, is a common cause of feline conjunctivitis. It can also affect the cornea, the clear surface at the front of the eye, and cause painful ulcers.
After the initial infection, the virus can remain inactive in the body. Stress or illness may trigger another episode later. A cat can develop recurring eye symptoms without having recently met another cat.
Feline calicivirus can also cause conjunctivitis, usually alongside other signs of respiratory illness. Mouth ulcers are another possible clue.
Bacteria can start an infection or complicate one
Chlamydia felis is a bacterial cause of conjunctivitis, particularly in younger cats. Certain Mycoplasma species can also be involved.
Bacteria may cause disease directly or take advantage of tissue already irritated or damaged by a virus or injury. That is why a cat with a viral illness may sometimes receive an antibiotic as part of treatment.
Some sore eyes are not infected
Dust, smoke, trapped material, abnormal eyelids, and problems with tear drainage can produce watering or inflammation. A scratch on the cornea may cause intense squinting before much discharge appears.
Inflammation inside the eye, called uveitis, and increased eye pressure, called glaucoma, can also make an eye look sore or cloudy. These conditions need different treatment.
One affected eye does not prove an injury, and two affected eyes do not prove an infection. The pattern is useful information for your vet, but it cannot settle the diagnosis.
What Happens During the Eye Exam?
Your veterinarian will ask when the problem began, whether it started in one eye or both, and whether your cat has been sneezing or feeling unwell. Recent contact with other cats, possible injuries, previous episodes, and any products already used are useful details.
The examination may include:
- Fluorescein staining: A dye test that highlights scratches or ulcers on the cornea.
- Tear testing: A check of whether the eye is producing enough tears.
- Eye pressure measurement: A test that helps investigate glaucoma and other eye conditions.
- Laboratory testing: A swab or other sample when identifying an infectious cause would help guide treatment.
Your vet will also look for trapped debris, eyelid problems, and changes inside the eye. Not every cat needs every test.
A photo taken when the symptoms first appeared can help show how things have changed. It cannot replace an examination of the eye.
Cat Eye Infection Treatment Options
Cat eye infection treatment depends on the cause and the part of the eye affected. Two cats with similar discharge may need quite different medication.
Antibiotic eye drops, ointments, or oral medication
A veterinarian may prescribe an antibiotic eye drop or ointment for a bacterial infection or to help protect a damaged cornea from infection.
Some bacterial conditions need treatment beyond the eye surface. C. felis, for example, often requires oral antibiotics over several weeks. Your vet will choose the medication and explain the full course.
Antibiotics do not kill viruses. Their use alongside treatment for a viral illness addresses an accompanying bacterial problem or a specific risk of one.
Antiviral treatment for herpes-related disease
Cats with certain herpesvirus eye problems may benefit from prescribed antiviral eye medication or an oral antiviral such as famciclovir.
The choice depends on the eye findings, severity, and what can be given reliably at home. Antiviral treatment helps control active disease; it does not remove latent herpesvirus from the body.
Recurring symptoms deserve another exam. A new episode may include an ulcer or another complication that was not present before.
Care for ulcers, injuries, and pain
A corneal ulcer may require protective antibiotic medication, pain relief, and a properly fitted cone to prevent rubbing. Deep or worsening ulcers may need surgery or treatment by a veterinary ophthalmologist.
Rechecks matter. An eye that looks less watery may still have an unhealed defect on its surface.
Steroid eye drops require particular caution. They can worsen herpesvirus disease and slow or damage corneal healing. Use a steroid-containing product only when your veterinarian has examined the eye and specifically determined it is appropriate for this episode.
What You Can Safely Do at Home
Home care can make your cat more comfortable and help prescribed treatment work. It cannot establish the cause of a sore eye.
Gently clean the surrounding area
Ask your clinic whether cleaning is appropriate while you arrange the appointment. When advised, use a soft, clean cloth dampened with lukewarm water to loosen discharge on the fur and eyelid edges.
Use a fresh cloth or clean section for each eye. Avoid scrubbing, pressing on the eyeball, or pulling apart lids that are stuck together. Stop if your cat resists or seems painful.
Your vet may recommend a sterile eye rinse for a particular situation. Cleaning away discharge does not treat the underlying infection.
Make the medication routine manageable
Ask the veterinary team to demonstrate how to give the prescribed eye drops for cats or ointment before you leave.
Wash your hands before and after treatment. Keep the bottle or tube tip away from the eye, eyelids, fur, and other surfaces. A quiet room and a small reward afterward can make the routine easier.
When several eye products are prescribed, ask which goes first and how long to wait between them. Follow the schedule and treatment length exactly. Contact the clinic if you cannot give the medicine reliably or it appears to cause increased redness or pain.
Keep the prescribed cone on as directed, even when your cat seems eager to remove it.
Leave home remedies out of the eye
Do not put tea, herbal mixtures, essential oils, peroxide, or homemade saltwater into your cat’s eye. Contact lens cleaning solution is not an eye treatment.
Human redness-relief drops, leftover pet medication, and nonprescription antibiotic products also need veterinary approval. A medicine used for a previous episode may be unsuitable for the current problem.
A Kitten Eye Infection Needs Prompt Attention
A kitten eye infection deserves a quick call to the vet. Young kittens can develop heavy discharge and swollen lids, sometimes with their eyes sealed shut by crust.
Do not pry the lids open. A veterinarian needs to assess the eye and manage the trapped discharge safely. Severe infections can damage the developing eye.
Tell the clinic immediately if the kitten is also failing to nurse or eat, becoming weak, or having trouble breathing. A respiratory illness can affect much more than the eyes in a small kitten.
How Long Does Recovery Take?
Some uncomplicated cases of conjunctivitis clear within roughly one to two weeks of appropriate treatment. Other infections need several weeks, and ulcers or recurring herpesvirus disease may take longer.
Ask your veterinarian when improvement should be noticeable and when a recheck is due. Call sooner if the eye becomes more painful, develops cloudiness, or is not improving as expected.
Finish medication for the prescribed period rather than stopping when discharge disappears. For corneal ulcers, your vet may repeat the dye test to confirm healing.
An infection that keeps returning needs reassessment. The reason may be herpesvirus reactivation, an unresolved eyelid or tear problem, or a different underlying condition.
Can Cat Eye Infections Spread to Other Cats?
Some can. Feline herpesvirus, calicivirus, and C. felis can spread between cats through infected secretions and close contact. Contaminated hands and shared items can also spread certain infections.
Until your vet advises otherwise, keep the affected cat apart from other cats and provide separate bowls, bedding, and a litter box. Wash your hands between caring for cats, and ask the clinic how to clean shared items safely.
Let your veterinarian know about every cat in the household. For some infections, cats without obvious symptoms may also need assessment or treatment.
Can people catch the infection?
Feline herpesvirus and feline calicivirus do not infect people. Rare transmission of C. felis from cats to humans has been reported.
Good hand hygiene is sensible, particularly after cleaning discharge or giving medication. Avoid touching your own eyes during care.
Reducing the Chance of Another Episode
Keep your cat’s vaccinations on the schedule recommended by your veterinarian. Vaccination against feline herpesvirus and calicivirus helps reduce disease severity, although it cannot prevent every infection or flare-up.
Introduce new cats with veterinary guidance and allow a separate settling-in area. Predictable routines, comfortable resting spots, and enough resources for each cat can help reduce stress.
Keep smoke and irritating sprays away from your cat. During ordinary petting, glance at both eyes for new watering, swelling, or a change in how widely they open.
When a problem returns, note when it started, which eye is affected, and any changes in appetite or breathing. Those details help your vet decide what your cat needs next.