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Comparison of postoperative exodrift after first unilateral and second contralateral lateral rectus recession in recurrent exotropia

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Author(s)
Eun Yeong KimHyun Kyung KimSe Youp LeeYoung Chun Lee
Keimyung Author(s)
Lee, Se Youp
Department
Dept. of Ophthalmology (안과학)
Journal Title
Korean Journal of Ophthalmology
Issued Date
2016
Volume
30
Issue
1
Keyword
Recurrent exotropiaStrabismus surgeryUnilateral rectus muscle recession
Abstract
Purpose: To compare postoperative exodrift of the first unilateral lateral rectus (ULR) muscle recession with the
exodrift of the second contralateral ULR muscle recession in patients with recurrent small-angle exotropia (XT).
Methods: We evaluated the results of a second ULR muscle recession in 19 patients with recurrent XT with deviation
angles under 25 prism diopter (PD), following a first procedure of ULR muscle recession for small-angle
XT. Recession of the lateral rectus muscle ranged from 8 to 9 mm. The postoperative motor alignment and
degree of exodrift were investigated after the first ULR muscle recession and the second ULR muscle recession
in the same patients.
Results: Observed differences in postoperative ocular alignment between the first ULR muscle recession and
the second ULR muscle recession were statistically significant at follow-up periods of six months (7.84 ± 4.43
vs. 3.89 ± 3.47 PD), one year (9.58 ± 4.97 vs. 5.21 ± 4.94 PD), and at a final follow-up (21.11 ± 2.98 vs. 7.52 ± 4.06
PD) after surgery (p = 0.006, 0.013, and 0.000). Postoperative exodrift was statistically different between the
first and second ULR muscle recessions at three to six months (2.89 ±3.75 vs. 0.63 ± 3.45 PD) and one year
to final follow-up (11.52 ± 5.50 vs. 2.32 ± 3.53 PD) (p = 0.034 and 0.000). All of the first ULR muscle recession
patients showed XT with deviation angles of more than 15 PD at the final follow-up. Regardless, the surgical
success rate (<8 PD) after the second ULR recession was 63.16% (12 patients) among the total amount of
patients with recurrent XT.
Conclusions: This study shows that changes in exodrift after a second ULR muscle recession are less than
changes after the first URL muscle recession among patients with recurrent XT. A second ULR muscle recession
may be a useful surgery for small-angle XT patients with deviation angles of 25 PD or less after a first
ULR muscle recession.
Keimyung Author(s)(Kor)
이세엽
Publisher
School of Medicine
Citation
Eun Yeong Kim et al. (2016). Comparison of postoperative exodrift after first unilateral and second contralateral lateral rectus recession in recurrent exotropia. Korean Journal of Ophthalmology, 30(1), 48–52. doi: 10.3341/kjo.2016.30.1.48
Type
Article
ISSN
1011-8942
DOI
10.3341/kjo.2016.30.1.48
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/33164
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Ophthalmology (안과학)
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