Dry Eye is diagnosed at your pet’s eye exam using a Schirmer Tear Test. Dry Eye is most often an inherited immune-mediated condition in adult dogs, meaning that the dog’s own immune system acts to inflame the glands so that they work poorly. Other potential causes include: a drug reaction (sulfa antibiotics, etodolac), birth defect, other illnesses (diabetes, hypothyroidism), nerve damage, and herpesvirus infection (cats). Consequences of untreated or poorly medication-responsive Dry Eye include persistent thick discharge, bacterial conjunctivitis, ocular discomfort, inflamed eyelids, corneal ulcerations, poor corneal healing, and progressive vision loss. The condition usually affects both eyes, is chronic, and requires management for the duration of the dog’s life.