Chae Sun Hwa, Chun Bo Young, Kwon Jung Yoon
Department of Ophthalmology, Kyungpook National University, School of Medicine, Daegu, Korea.
Korean J Ophthalmol. 2008 Sep;22(3):174-7. doi: 10.3341/kjo.2008.22.3.174.
To investigate the effect of unilateral medial rectus muscle resection for recurrent exotropia after bilateral lateral rectus muscle recession for intermittent exotropia
A retrospective analysis was made of thirtypatients who underwent unilateral medial rectus resection for recurrent exotropia. All had prior bilateral lateral rectus recession for intermittent exotropia. Data were collected for age, the preoperative deviation, the postoperative deviation at 2 weeks, 3 months, 6 months and the last visit, and the amount of medial rectus resection performed.
The average preoperative deviation was 27.0+/-3.6 PD. After unilateral medial rectus resection, average deviation at distance was 2.8 PD at postoperative 2 weeks, 4.5 PD at 3 months, 5.1 PD at 6 months and 5.8 PD at last visit. The average deviation corrected per millimeter of medial rectus resection was 3.53+/-0.17 PD/mm.
Considering that deviation angles of recurrent exotropia is smaller than those of primary surgery and the possibility of saving the other medial rectus muscle, unilateral rectus muscle resection could be effective surgical method for recurrent exotropia.
探讨单侧内直肌切除术治疗间歇性外斜视双侧外直肌后徙术后复发性外斜视的效果
回顾性分析30例行单侧内直肌切除术治疗复发性外斜视的患者。所有患者既往均因间歇性外斜视接受过双侧外直肌后徙术。收集患者年龄、术前斜视度、术后2周、3个月、6个月及末次随访时的斜视度，以及内直肌切除量等数据。
术前平均斜视度为27.0±3.6三棱镜度（PD）。单侧内直肌切除术后，术后2周远距离平均斜视度为2.8 PD，3个月时为4.5 PD，6个月时为5.1 PD，末次随访时为5.8 PD。每毫米内直肌切除矫正的平均斜视度为3.53±0.17 PD/mm。
考虑到复发性外斜视的斜视角度小于初次手术，且有可能保留另一侧内直肌，单侧内直肌切除术可能是治疗复发性外斜视的有效手术方法。
