Clinical characteristics of intermittent exotropia according to fusional control: findings from the Korean Intermittent Exotropia Study (KIEMS).

Dae Hee Kim, Helen Lew, Sang Hoon Rah, Yung-Ju Yoo, Hyosook Ahn, Ungsoo S Kim, Jung Ho Lee, Se-Youp Lee
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Abstract

Purpose: To investigate clinical features of intermittent exotropia (IXT) according to fusional control status from the Korean Intermittent Exotropia Multicenter Study (KIEMS).

Methods: A total of 2715 IXT participants from the KIEMS dataset were included in this study. We collected age, sex, best corrected visual acuity in LogMAR (BCVA), cycloplegic refraction data, exotropia angle and fusional control status, and near stereoacuity. Exotropia types were classified into basic, convergence insufficiency (CI) and divergence excess (DE) types. Distributions of exotropia type and sex according to fusional control status were investigated. Age, BCVA, spherical equivalents, exotropia angle and near stereoacuity were compared according to fusional control status.

Results: Female to male ratio was 1316 (48.5%) to 1399 (51.5%). Mean age of the participants was 9.4 ± 6.4 years. Mean exotropia angle was 22.5 ± 8.8 and 24.8 ± 9.4 prism diopters at distant and near fixation. Fusional control status was better in CI at distant and DE at near (P = 0.002, 0.021 each). Distant and near exotropia angle were larger in patients with worse distant and near control (P < 0.001). Near stereoacuity was also worse in patients with worse distant and near control (P < 0.001). Good distant control patients had more myopic SE (P < 0.001). Poor near control patients showed worse BCVA and larger BCVA difference (P < 0.001).

Conclusion: Fusional control was highly associated with exotropia type and angle, near stereoacuity, and visual acuity. Near fusional control was associated with mean and difference of BCVA in both eyes.

根据融合控制的间歇性外斜视的临床特征:来自韩国间歇性外斜视研究(KIEMS)的发现。
目的:根据韩国间歇性外斜视多中心研究(KIEMS)的融合控制状态,探讨间歇性外斜视(IXT)的临床特征。方法:本研究共纳入2715名来自KIEMS数据集的IXT参与者。我们收集了年龄、性别、LogMAR最佳矫正视力(BCVA)、睫状体麻痹性屈光数据、外斜视角度和融合控制状态以及近立体视力。外斜视类型分为基本型、收敛不足型和发散过剩型。根据融合控制情况,观察外斜视类型和性别的分布。根据融合控制情况比较年龄、BCVA、球当量、外斜视角和近立体视敏度。结果:男女比例为1316(48.5%):1399(51.5%)。参与者平均年龄9.4±6.4岁。远视和近视的平均外斜视角度分别为22.5±8.8和24.8±9.4棱镜屈光度。远CI和近DE的融合控制状态较好(P = 0.002, 0.021)。远、近对照差的患者远、近外斜视角较大(P < 0.001)。远近控制较差的患者近立体视力也较差(P < 0.001)。远处对照良好的患者近视SE发生率较高(P < 0.001)。近对照差患者BCVA较差,BCVA差异较大(P < 0.001)。结论:融合控制与外斜视类型、角度、近立体视敏度和视力密切相关。近融合控制与双眼BCVA的均值和差值有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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