Axenfeld-Rieger syndrome (Monarch Disease Ontology id MONDO_0019187) (ARS) is a generic term used to designate overlapping genetic disorders, in which the major physical condition is anterior segment dysgenesis of the eye. Patients with ARS may also present with multiple variable congenital anomalies. Also known as: ARS, Axenfeld syndrome, Axenfeldt-Rieger syndrome, RGS - Rieger syndrome, Rieger syndrome, Rieger's anomaly, anomaly, Rieger's.