aniridia renal agenesis psychomotor retardation aniridia renal agenesis psychomotor retardation aniridia ataxia renal agenesis psychomotor retardation is a rare genetic disorder characterized by missing irises of the eye, ataxia, psychomotor retardation and abnormal kidneys. it is detected via genetic test. aniridia renal agenesis psychomotor retardationother namessommer-rathbun-battles syndrome