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The surgical methods for correction of an abnormal head posture in congenital nystagmus presently in use, do not correct the head posture adequately and in some cases produce a postoperative tropia. We felt that this may be related to the arbitrary quantities of surgery suggested by various workers. We have observed that surgery on the medial rectus is approximately one and a half times as effective as on the lateral. Using this ratio, excellent results have been obtained in 5 cases which are reported herein.