Certain viral and bacterial infections in young cats can cause conjunctivitis (inflammation of the pink membrane on the inside of the eyelids and around the eye) and sometimes corneal disease. The cornea is the clear window at the front of the eye.
The same infection often also causes inflammation of the nose, lungs and/or tongue. Signs may include discharge from the eyes or excessive tearing, signs of eye pain (squinting, keeping the eye closed or keeping the third eyelid over the eye), redness in the eyes, cloudiness of the corneas, sneezing, discharge from the nose, coughing, drooling and difficulty eating.
If you observe these symptoms in your cat, contact your veterinarian.