Feline eosinophilic keratitis in cats, also called FEK or proliferative keratitis, is a medical condition that occurs when a cat’s cornea becomes inflamed due immune-mediated issues.
The condition often appears in cats who contract the feline herpesvirus-1 (FHV-1) — and cats under the age of four also seem most likely to develop it. Note that this is a different condition to
