Surgical treatment for congenital motive defect nystagmus by the parks (5, 6, 7, 8mm) procedure or the augmented Parks procedure

PURPOSE: The purpose of the surgical treatment for patients with congenital motive detect nystagmus was to correct deviation of the eye and the head tilt, to improve vision and eliminate nystagmus. METHODS: 19 patients underwent the Parks (5, 6, 7, 8mm) or the augmented Parks procedure from 1987 to 1994. For patients with abnormal head turn > or = 30 degrees, We used a 40-60% augmented Parks procedure. RESULTS: A follow up of 19 patients ofr an average of 22 months revealed a marked improvemtnts. After operation, the head turn was decreased form 30.5 degrees to 4.9 degrees, the intensity of nystagmus was decreased from 36.0 to 9.7, 21 eyes (55.3%) of 19 patients improved by two or more lines of Snellen visual acuity. CONCLUSIONS: The Parks (5, 6, 7, 8mm) and the augmented Parks (5, 6, 7, 8mm) procedure produce a marked correction for congenital motive defect nystagmus.