Wu Yidong, Xu Meiping, Zhang Junxiao, Zhou Jinjing, Wan Minghui, Dai Zhiyue, Peng Tingting, Min Seung Hyun, Hou Fang, Zhou Jiawei, Yu Xinping
The Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.
McGill Vision Research, Department of Ophthalmology and Visual Sciences, McGill University, Montreal, QC, Canada.
J Ophthalmol. 2020 Jul 21;2020:7392165. doi: 10.1155/2020/7392165. eCollection 2020.
To evaluate whether clinical measures of postoperative binocular functions could predict the long-term stability of postoperative ocular alignment in children with intermittent exotropia.
A retrospective study was performed in thirty-nine children (median: 7 years) who have been surgically treated from intermittent exotropia without overcorrection (less than 10 prism diopters [pd] of exodeviation at 1 month postoperatively). Angles of deviation and binocular functions were measured preoperatively and at 1 month, 6 months, and the final follow-up visit (≥24 months) postoperatively. We examined the relationships between postoperative drift (change of ocular alignment) and binocular functions (sensory fusion, fusional convergence amplitude, and stereoacuity).
The surgical success rate (esophoria/tropia ≤5 pd to exophoria/tropia ≤10 pd) dropped to 76.9% at 6 months after surgery and to 53.8% at individuals' last visit (mean: 37 months). The mean exodrift was 7.7 ± 9.2 pd from the postoperative month 1 to the final visit ( < 0.001) on distance fixation. Distance stereoacuity, central fusion, and fusional convergence amplitude significantly improved following surgery ( < 0.05). However, no significant correlation was found between their binocular functions measured at the beginning of each follow-up period and the postoperative drift (all > 0.13).
Our findings suggest that the clinical measures of sensory fusion, fusional convergence amplitude, and stereoacuity cannot serve as a robust predictor for the long-term stability of postoperative ocular alignment in patients who underwent successful surgery without overcorrection at 1 month postoperatively.
评估间歇性外斜视患儿术后双眼功能的临床指标能否预测术后眼位的长期稳定性。
对39例（中位年龄：7岁）接受间歇性外斜视手术治疗且无过度矫正（术后1个月外斜度小于10棱镜度[pd]）的患儿进行回顾性研究。术前及术后1个月、6个月和末次随访（≥24个月）时测量斜视度和双眼功能。我们研究了术后漂移（眼位变化）与双眼功能（感觉融合、融合性集合幅度和立体视锐度）之间的关系。
术后6个月手术成功率（内隐斜/斜视≤5 pd至外隐斜/斜视≤10 pd）降至76.9%，末次随访时降至53.8%（平均：37个月）。从术后第1个月至末次随访，远距离注视时平均外斜漂移为7.7±9.2 pd（<0.001）。术后远距离立体视锐度、中心融合和融合性集合幅度显著改善（<0.05）。然而，在每个随访期开始时测量的双眼功能与术后漂移之间未发现显著相关性（均>0.13）。
我们的研究结果表明，对于术后1个月手术成功且无过度矫正的患者，感觉融合、融合性集合幅度和立体视锐度的临床指标不能作为术后眼位长期稳定性的可靠预测指标。
