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목적 : To compare pre- and post-operative distance deviation angle in recurrent exotropes and to determine factors associated with large angle recurrent exotropia.
방법 : Medical records of 77 recurrent exotropes who were followed-up more than 2 years without second corrective procedure were reviewed. The largest angle after recurrence (LAAR) was compared with the preoperative deviation angle (PA) and the largest preoperative deviation angle (LPA). Patients were classified into those who had LAAR < PA and LAAR ≥ PA. Differences in clinical factors between groups were examined.
결과 : Mean age at surgery was 6.0 ± 2.6 years and mean postoperative follow-up was 32.5 ± 7.6 months. Both LAAR (R2 = 0.12; p < 0.01) and PA-LAAR (R2 = 0.54; p < 0.01) were positively correlated with PA and LAAR/PA was negatively correlated with PA (R2 = 0.26; p < 0.01). Thirteen patients who showed LAAR ≥ PA had a smaller PA (p < 0.01) and LPA (p = 0.04) compared to patients whose LAAR was smaller than the PA. Preoperative intermittency was associated with LAAR ≥ PA (p = 0.01). All LAAR ≥ PA subjects had a PA ≤ 30 prism diopters.
결론 : Patients with moderate-to-small preoperative exodeviation angles may have a larger recurrent exo-angle than the preoperative one. Patients with preoperative constant deviation had a smaller LAAR/PA ratio than patients with intermittent exotropia. A relatively large recurrence angle (LAAR ≥ PA) may occur in intermittent exotropes with moderate-to-small exodeviation angles.
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