J Korean Ophthalmol Soc > Volume 61(3); 2020 > Article
Journal of the Korean Ophthalmological Society 2020;61(3):281-287.
DOI: https://doi.org/10.3341/jkos.2020.61.3.281    Published online March 15, 2020.
Changes in the Effects of Bilateral Lateral Rectus Muscle Recession According to Preoperative Angle Deviation.
Sung Ha Hwang, Hae Jung Paik
Department of Ophthalmology, Gachon University Gil Medical Center, Incheon, Korea. hjpaik@gilhospital.com
술 전 사시각에 따른 양안 외직근후전술 후 시간경과에 따른 교정 효과 변화
황성하⋅백혜정
가천대학교 의과대학 길병원 안과학교실
Correspondence:  Hae Jung Paik,
Email: hjpaik@gilhospital.com
Received: 12 February 2019   • Revised: 22 April 2019   • Accepted: 21 February 2019
Abstract
PURPOSE
To investigate how the effect of bilateral rectus muscle recession changed by analyzing the effect/dose ratio of surgery according to the preoperative angle deviation. METHODS: We retrospectively studied the medical records of patients from January 2007 to March 2014 who underwent bilateral lateral rectus muscle recession and who visited our hospital for at least 2 years after surgery. We classified the patients into two groups: the preoperative large angle deviation group (35 prism diopters [PD] or more) and the small angle deviation group (20 PD or less). We observed exodrift patterns by measuring distant and near angle deviation according to the preoperative and postoperative times. The effect/dose ratio of recession was calculated at each visit. Surgical success was defined as an alignment between 10 PD of exodeviation and 5 PD of esodeviation, both at distance and at near. RESULTS: Among 165 patients, 84 patients were in the large angle deviation group and 81 patients were in the small angle deviation group. Preoperative angle deviation of the large angle deviation group was 39.34 ± 5.13 PD (range: 35–55 PD) and the small angle deviation group was 19.49 ± 1.62 PD (range: 18-20 PD) (p < 0.001). At postoperative 1 day, the alignments of eyes of the two groups were −8.32 ± 9.31 PD and −13.11 ± 6.94 PD; p < 0.001, respectively. At the date of the final follow-up, the alignments of eyes of the two groups were 4.63 ± 8.94 PD and 1.22 ± 8.01 PD; p = 0.011, respectively, and the effect/dose ratios were 2.25 ± 0.62 PD/mm and 1.94 ± 0.78 PD/mm, respectively, which meant that the effect of correction for the large angle deviation group was larger than that of the small angle deviation group (p = 0.005). Both groups showed postoperative exodrift patterns and similar success rates (75.0% and 80.2%, respectively), which showed no significant difference (p = 0.268). CONCLUSIONS: The small angle deviation group showed a larger effect of correction and high exodrift pattern at the postoperative initial time and the large angle deviation group showed a smaller effect of correction and low exodrift pattern at the postoperative initial time. The preoperative angles of deviation and the operative success rates were not related.
Key Words: Bilateral lateral rectus muscle recession;Intermittent exotropia


ABOUT
BROWSE ARTICLES
EDITORIAL POLICY
FOR CONTRIBUTORS
Editorial Office
SKY 1004 Building #701
50-1 Jungnim-ro, Jung-gu, Seoul 04508, Korea
Tel: +82-2-583-6520    Fax: +82-2-583-6521    E-mail: kos08@ophthalmology.org                

Copyright © 2024 by Korean Ophthalmological Society.

Developed in M2PI

Close layer
prev next