A–Z topic · E
Eye problems in cats
Quick answer
**Small amounts of clear discharge** may be normal in flat-faced breeds or after sleep. **Thick yellow or green discharge, squinting, redness, or cloudiness** needs a vet — often cat flu, infection, or a corneal ulcer. Eye problems in cats can progress quickly and should not wait.
Key takeaways
- Viral cat flu can spread between cats in the same household. Isolate new cases if possible and wash hands after handling. Discharge from blocked tear ducts alone is not contagious.
- Yes — dust, pollen, and smoke can irritate eyes. Allergies usually cause clear discharge without squinting, but persistent signs still deserve a vet check.
- Squinting, a bulging eye, thick green pus, or a cloudy cornea needs same-day care. Corneal ulcers are painful and can worsen within hours.
The full guide
Causes, symptoms, treatment options and when to call your vet — in the complete plain-English guide.
Frequently Asked Questions
- Is cat eye discharge contagious?
- Viral cat flu can spread between cats in the same household. Isolate new cases if possible and wash hands after handling. Discharge from blocked tear ducts alone is not contagious.
- Can allergies cause runny eyes in cats?
- Yes — dust, pollen, and smoke can irritate eyes. Allergies usually cause clear discharge without squinting, but persistent signs still deserve a vet check.
- When is eye discharge urgent in cats?
- Squinting, a bulging eye, thick green pus, or a cloudy cornea needs same-day care. Corneal ulcers are painful and can worsen within hours.