J Korean Ophthalmol Soc > Volume 56(9); 2015 > Article
Journal of the Korean Ophthalmological Society 2015;56(9):1424-1431.
DOI: https://doi.org/10.3341/jkos.2015.56.9.1424    Published online September 15, 2015.
The Effect of Inferior Oblique Muscle Transposition in Primary and Secondary Inferior Oblique Muscle Overaction.
Ju Sang Kim, Sung Eun Park
Department of Ophthalmology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea. 212010@eulji.ac.kr
일차 하사근기능항진과 상사근마비에 의한 이차 하사근기능항진에서 하사근전위술의 교정효과
김주상⋅박성은
을지대학교 의과대학 을지병원 안과학교실
Received: 6 February 2015   • Revised: 11 May 2015   • Accepted: 10 July 2015
Abstract
PURPOSE
To evaluate and compare the effect of transposition of inferior oblique muscle in patients with primary inferior oblique muscle overaction and secondary due to superior oblique muscle palsy. METHODS: The present study included 41 patients (53 eyes), who appeared to have primary or secondary inferior oblique muscle overaction due to superior oblique muscle palsy and received transposition of inferior oblique muscle with at least 3 months of follow-up. Patients were retrospectively analyzed to compare the effect of correction and its prognosis. Inferior oblique muscle overaction was graded as +1 to +4 according to the severity. Successful surgery was defined as postoperative inferior oblique muscle overaction from 0 to +1 and failure as above +2. Hypertropia in primary gaze was also recorded to evaluate the effect of correction. RESULTS: Twenty-six (35 eyes) and 15 (18 eyes) patients with primary and secondary inferior oblique muscle overaction due to superior oblique muscle palsy, respectively, received transposition of inferior oblique muscle. Patients with primary inferior oblique muscle overaction showed correction of 2.1 +/- 0.9 with preoperative inferior oblique muscle overaction of 2.0 +/- 0.7. Patients with secondary inferior oblique muscle overaction showed a correction of 2.3 +/- 0.9 with preoperative value of 2.3 +/- 0.8. Each 3.2 +/- 4.1 prism diopters (PD) and 6.5 +/- 5.3 PD of hypertropia at primary gaze showed correction of 3.0 +/- 7.4 PD and 6.3 +/- 5.1 PD, respectively, in each group. CONCLUSIONS: Primary and secondary inferior oblique muscle overaction due to superior oblique muscle palsy showed no difference in correction of overaction and hypertropia after transposition of inferior oblique muscle. Except for presence of inferior oblique muscle underaction, the correction appears effective with good prognosis.
Key Words: Inferior oblique muscle overaction;Superior oblique muscle palsy;Transposition


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