dry eye syndrome (Monarch Disease Ontology term MONDO_0006733) is a syndrome characterized by dryness of the cornea and conjunctiva. It is usually caused by a deficiency in tear production. Symptoms include a feeling of burning eyes and a possible foreign body presence in the eye. Also known as: KCS, dry eye, dry eye(s), eye(s), dry, keratoconjunctivitis sicca, sicca, keratoconjunctivitis, tear film insufficiency.