Change of Strabismus Angle and Deviation After Unilateral or Bilateral Lateral Rectus Recession in Exotropia.

Hwang, Kyu Yeon; Lee, Se Yup; Lee, Young Chun

doi:2011.52.1.60

J Korean Ophthalmol Soc > Volume 52(1); 2011 > Article

Original 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

황규연¹ㆍ이세엽²ㆍ이영춘¹

Department of Ophthalmology, The Catholic University of Korea School of Medicine¹, Seoul, Korea Department of Ophthalmology, Keimyung University School of Medicine², Daegu, Korea

Abstract

PURPOSE
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