목적 : To investigate the effect of initial postoperative minimal overcorrection on the result of the surgical management of intermittent exotropia based on long term follow- up results.방법 : A total of 111 patients who underwent surgery for intermittent exotropia and at least 5 years follow-up after surgery were retrospectively reviewed. The outcome was judged to be successful where there was 10PD or less of exodeviation and less than 5 PD of esodeviation without any reoperation at the final follow-up visit. We evaluated the success, recurrence, overcorrection rate and the duration of diplopia were recorded according to their initial deviation. 결과 : We divided patients into four groups based on their initial deviation: orthophoria or undercorrection (Ortho group, 31 patients), minimally overcorrected at 5PD or less (MO group), usually overcorrected between 6 PD and 10PD (UO group, 35 patients), and highly overcorrected at more than 10PD (HO group, 25 patients). The success rate was 43-60% between the four groups (p=0.52). The recurrence rate was 28-57% (p=0.105), but post hoc analysis showed borderline p values between the Ortho and HO group (p=0.024). No overcorrection was noted in the Ortho and MO groups (p=0.04). The duration of diplopia was 0-2.5 weeks, showing statistically significant difference among groups (p<0.001) 결론 : The amount of initial postoperative overcorrection may not predict the long-term success rate. However, the minimally overcorrected group showed a lower recurrence rate than the ortho and undercorrected groups and also showed no overcorrection and a shorter duration of postoperative diplopia than the overcorrected and highly overcorrected groups.
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