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목적 : To compare the motor and sensory outcome of intermittent exotropia patients who lost distance control preoperatively with that of intermittent and constant exotropia
방법 : Two-hundred eighteen patients who underwent surgery for exotropia were classified into 3 groups according to motor fusional control on distance and near: X(T) (Group A), XT on distance fixation (Group B) and XT group (Group C). Motor success rate and sensory outcome was compared between the groups.
결과 : Overall recurrence rate (p=0.47) and cumulative probability of recurrence were not different between the groups (p=0.57; Group A vs B, p=0.64; Group B vs C, p=0.14; Group A vs C). The percentage of patients who acquired postoperative bifixation (stereoacuity＜60 arcseconds) was higher in Group A than in Group B and C (77.5%, 46.7% and 57.1%, respectively; p=0.01). Patients with XT (Group C) showed higher ratio of postoperative monofixation (33.3%) than Group A and B, but there found no significant difference between Group A (7.1%) and B (20.0%).
결론 : The motor success rate is not affected by preoperative motor fusion status. Preoperative loss of distance control is associated with decreased postoperative bifixation even if near control is present. However, the risk of postoperative monofixation is significantly elevated only when both distance and near control had been lost preoperatively.
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