Why Does My Cat Have Uneven Eye Size?

1 Common Causes

Foreign object: lashes or dust irritate the eye and cause swelling so it cannot open. Check for debris or eyelid inversion, wipe gently with a clean cloth, and use cat eye drops for inflammation. If eyelid inversion is the cause, surgery at a clinic is the fix.

Eye disease: redness and discharge without debris suggest conjunctivitis or keratitis from bacteria. Use cat-specific eye drops, add anti-inflammatories only if severe, and supplement taurine to speed recovery. Confirm the cause with a vet before medicating.

Feline rhinotracheitis (cat flu): uneven eyes with heavy discharge, sneezing, cough, runny nose, and fever is urgent. Take the cat to a veterinary hospital for antiviral and antibiotic treatment; this is hard to manage well at home.

Trauma: scratches from fights or bumps show swelling and are easy to spot. Mild cases heal on their own, helped by eye drops.

Heat: greasy food, too many snacks, or low vitamins, fiber, and water can cause tearing and one eye to look smaller. Switch to lighter food and add water to relieve it.

2 What to Do

Match the response to the cause. Clear simple debris at home, but for eyelid inversion, suspected infection, or any signs of cat flu, consult a veterinarian promptly for the right treatment.