The Surgical Effects of Inferior Oblique Anteriorization

ABSTRACT

PURPOSE: To find out the effect and proper indications, we studied the effect and complications of anteriorization of the inferior oblique muscle in each type of strabismus. METHODS: We retrospectively studied 33 cases (50 eyes) of primary inferior oblique overaction (IOOA), 17 cases (17 eyes) of superior oblique muscle palsy, and 20 cases (27 eyes) of dissociated vertical deviation (DVD), who received inferior oblique anterior transposition at Chonnam National University Ophthalmology Department from January 1996 to December 2001. RESULTS: In the cases of primary IOOA, the success rate for IOOA of +3~4 was 88%. In the cases of superior oblique palsy, the mean correction of vertical deviation was 14.4 delta. In superior oblique palsy of preoperative vertical deviation less than 15 delta, the success rate was 83%. In DVD, the mean correction of vertical deviation was 9.6 delta and the success rate of preoperative deviation less than 10 delta was 80%. In 11 eyes of 11cases out of 70 cases, complications, including like elevation limitation, IOOA of opposite eye, and hypotropia at primary position, occurred. CONCLUSIONS: In cases of IOOA of +3~4, with superior oblique palsy of preoperative vertical deviation about 15 delta, and DVD of preoperative deviation less than 10 delta, good results were obtained by inferior oblique anteriorization.