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Feline eosinophilic keratitis/keratoconjunctivitis (FEK) refers to an immune-mediated inflammation of the cornea -- the external coating of the eye. This medical condition can also be referred to as proliferative keratitis – where keratitis is the clinical term for inflammation of the cornea, and proliferative refers to the rapid and excessive nature of the inflammation of the cornea. Cats that are experiencing this inflammation do not generally experience pain, although there can be some discomfort. The inflammation can occur in one or both eyes.
The exact causes are unknown, but it is thought that the Feline herpesvirus-1 (FHV-1) may be associated with this inflammation.
Your veterinarian will want to rule out the following medical conditions prior to diagnosing keratitis:
A type of slime that is made up of certain salts, cells, or leukocytes
A medical condition in which the cornea becomes inflamed
More blood than normal in a body part
Having two sides