ANnomalous duplication of inferior oblique muscle

During an operation for rhegmatogenous retinal detachment, an anomalous right inferior oblique muscle was found incidentally in a 59-year-old woman. The patient showed no muscle imbalance and had no clinical history of muscle imbalance. The anomaly consisted of parallel muscles (apparently originating from a common origin) inserting separately into the sclera. No other muscle anomalies were noted.