J Korean Ophthalmol Soc > Volume 52(1); 2011 > Article
Journal of the Korean Ophthalmological Society 2011;52(1):60-66.
DOI: https://doi.org/10.3341/jkos.2011.52.1.60    Published online January 15, 2011.
Change of Strabismus Angle and Deviation After Unilateral or Bilateral Lateral Rectus Recession in Exotropia.
Kyu Yeon Hwang, Se Yup Lee, Young Chun Lee
1Department of Ophthalmology, The Catholic University of Korea School of Medicine, Seoul, Korea. yclee@cmcnu.or.kr
2Department of Ophthalmology, Keimyung University School of Medicine, Daegu, Korea.
외사시 환자에서 사시각에 따른 단안 혹은 양안 외직근 후전술 후 사시각 변화와 편차의 비교
Department of Ophthalmology, The Catholic University of Korea School of Medicine1, Seoul, Korea Department of Ophthalmology, Keimyung University School of Medicine2, Daegu, Korea
To compare the changes in strabismus angle and deviation between two groups: a bilateral lateral rectus recession (Group 1) and a unilateral lateral rectus recession in exotropia (Group 2). METHODS: A retrospective survey was conducted on 198 patients who had received exotropia surgery in our ophthalmology clinic from September 2003 to April 2007. A total of 116 patients were in Group 1, and 82 patients were in Group 2. RESULTS: The average deviations of the first postoperative month and the first postoperative year were -1.96 D +/- 4.75, 2.5 D +/- 7.82 for Group 1 and 0.77 D +/- 2.87, 5.94 D +/- 3.38 for Group 2. Revealing statistical significance between the 2 Groups: Group 1 had 30 failure cases (25.9%) and their 1 postoperative year average deviation was 5.42 D +/- 13.97, while Group 2 showed 24 failure cases (29.3%) and their 1-postoperative-year average deviation was 13.0-79 +/- 3.04. Group 1 had less strabismus angle and a greater standard deviation than Group 2, as Group 1 had more overcorrection. Among the 30 failure cases of Group 1, 9 were overcorrected and 21 were undercorrected, but all 24 failure cases in Group 2 were undercorrected. CONCLUSIONS: The strabismus angle after lateral rectus recession showed a wider variation and a larger difference in bilateral lateral rectus recession than in the unilateral lateral rectus recession.
Key Words: Bilateral lateral rectus recession;Deviation angle;Exotropia;Unilateral lateral rectus recession

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