目的　探讨外直肌超常量后徙治疗大度数外斜视的效果。方法　对 3 6例 ( 72只眼 )大于 2 5°的共转性外斜视患者施行双外直肌超常量后徙 8～ 14mm ,加或不加内直肌缩短 ,随访 6个月～ 2年。结果　术后眼位 ,2 9例正位 ,5例欠矫 ,2例过矫。 3 2只眼外转不足 2～ 4mm。结论　该手术操作简便快捷 ,损伤小 ,效果满意 Objective To investigate the effect of exotropia on the exotropia for the treatment of large exotropia. [Methods] 366 cases (72 eyes) of greater than 25 degrees of co-rotation exotropia patients with double lateral rectus abnormalities after reset 8 ~ 14mm, with or without rectus muscle shortening, followed up for 6 months to 2 years . Results Postoperative ophthalmic position, 29 cases were orthophoria, 5 cases undercorrection, 2 cases overcorrection. 32 outside the eye to less than 2 ~ 4mm. Conclusion The operation is simple and quick, less damage and satisfactory results