Normal vs. Abnormal Eye Discharge
Not all eye discharge is a problem. Here's how to tell the difference:
| Type | What It Looks Like | Is It Normal? |
|---|---|---|
| Rust-colored crust | Small amount in inner corners, especially after sleep | ✅ Normal (tear pigment) |
| Clear watery tears | Mild tearing, no crusting | ⚠️ Monitor (allergies, dust, blocked tear duct) |
| Yellow/green pus | Thick, sticky, crusts eyes shut | ❌ Infection—see vet within 24hrs |
| Third eyelid showing | White/pink membrane (nictitating membrane) covering part of eye | ❌ Pain or illness—see vet |
How to Clean Your Cat's Eyes (Step by Step)
- Gather supplies: Sterile saline solution (contact lens solution WITHOUT preservatives works), cotton balls or soft gauze, a towel. Check that saline is within its expiration date and has not been contaminated.
- Check your hands: Ensure your hands are clean and free of lotions, oils, or chemicals that could irritate the eye.
- Position your cat: Wrap in a towel "burrito" style to prevent scratching. Have a helper if possible.
- Wipe gently: Dampen a fresh cotton ball with saline. Gently wipe from the inner corner (near nose) outward. Always wipe in one direction only—never back and forth—to avoid pushing debris back into the eye. Use a new cotton ball for each wipe, and never use the same cotton ball on both eyes.
- Soften crusts first: If discharge is crusted, hold a damp warm cloth against the eye for 30-60 seconds to soften before wiping. Never pick at dry crust.
- Don't touch the eyeball: Only wipe the skin around the eye and the eyelid margins. If the eye is painful or your cat reacts strongly, stop and see the vet.
- Observe reaction: After cleaning, watch for persistent squinting or light sensitivity, which may indicate underlying damage.
- Never use tap water: Its pH and osmolarity differ from tears and it may contain microbes. Always use sterile saline.
- Never use: Human eye drops (Visine, Clear Eyes), hydrogen peroxide, alcohol, or tea bags. These can cause severe damage.
- No foreign objects: If you suspect an embedded object or penetrating injury, do not attempt to remove it or clean the area. Seek emergency veterinary care immediately.
Common Cat Eye Problems
1. Conjunctivitis (Pink Eye)
Symptoms: Red, swollen inner eyelids; clear or yellow discharge; squinting; rubbing eyes.
Causes: Viral (feline herpesvirus most common), bacterial, allergic, or foreign body.
What to do: Keep eyes clean with saline. See vet within 24-48hrs—viral conjunctivitis can lead to corneal ulcers if untreated.
2. Corneal Ulcer
Symptoms: Severe squinting, tearing, pawing at eye, cloudiness on the eye surface, visible redness.
Causes: Scratches from fights, foreign material, herpesvirus, untreated infections.
What to do: EMERGENCY. Corneal ulcers can perforate within 24-48 hours, causing permanent blindness. If you suspect a foreign body or penetrating injury, do NOT attempt to remove it—seek emergency care immediately.
3. Feline Herpesvirus (FHV-1)
Symptoms: Recurrent conjunctivitis, sneezing, nasal discharge, eye ulcers. Stress triggers flare-ups.
Prevalence: Most cats are exposed to FHV-1 in their lifetime, and many become lifelong carriers.
Management: No cure, but flare-ups can be managed with antiviral meds prescribed by a vet. Note: L-lysine supplements are no longer routinely recommended by major feline health organizations due to limited evidence of efficacy; consult your vet for current management strategies.
4. Blocked Tear Duct (Epiphora)
Symptoms: Constant tearing, brown staining under eyes (common in flat-faced breeds like Persians).
Causes: Narrowed tear ducts, facial structure, chronic inflammation.
What to do: Keep area clean and dry. In severe cases, vet can flush tear ducts under anesthesia.
5. Glaucoma
Symptoms: Enlarged or bulging eye, fixed dilated pupil, cloudiness, extreme pain, squinting.
Causes: Increased intraocular pressure, often idiopathic or secondary to other conditions.
What to do: EMERGENCY. Glaucoma causes rapid vision loss and severe pain. Requires immediate veterinary intervention to preserve vision and comfort.
When to Go to the Vet IMMEDIATELY
Seek care within hours for these signs:
- Eye is bulging or appears swollen
- Cornea (clear surface) is cloudy, white, or has a visible defect
- Cat is pawing at eye aggressively or hiding in pain
- Third eyelid is covering more than half the eye
- Blood visible in or around the eye
- Sudden blindness (bumping into furniture, dilated pupils)
See vet within 24 hours for:
- Green/yellow discharge with squinting
- Persistent mild tearing without improvement
Breed-Specific Considerations
- Flat-faced breeds (Persian, Himalayan, Exotic Shorthair): Shallow eye sockets mean eyes protrude more—higher risk of ulcers, tearing, and injury. Need daily eye cleaning.
- Siamese & related breeds: Higher risk of glaucoma and inherited eye conditions.
- Older cats (10+): Watch for glaucoma (painful, high eye pressure) and cataracts. Annual eye exams recommended.
Choosing Eye Care Products
For healthy cats, routine cleaning is typically needed 2-3 times per week. Flat-faced breeds or those prone to tearing may require daily cleaning. Always use sterile saline and fresh cotton materials for each wipe.
When selecting products, look for gentle, non-irritating options. Common types include sterile saline solutions, boracic acid-based wipes, and fragrance-free pet eye wipes. Avoid products containing alcohol, harsh chemicals, or human-grade ingredients unless explicitly approved by your veterinarian. If using multiple eye medications, apply drops first, wait at least 5 minutes, then apply ointment as directed by your vet.
Disclaimer: This guide is for educational purposes. Always consult your veterinarian for diagnosis and treatment. Eye problems in cats can deteriorate rapidly—when in doubt, see a vet.