500
                                Viral infections, drug-related toxicities, immune-mediated disease, inflammation, breed predisposition, and congenital anomalies.
Recurrent conjunctivitis, corneal ulcers, keratitis
Cornea and conjunctiva appear dull, dry, and irregular
Tenacious mucoid ocular discharge on lid margins and in the medial canthus
                                What is keratoconjunctivitis sicca?  AKA: dry eye