Hou Xiaoyi, Yang Xubo, Chen Bingjie, Liao Yongchuan
Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, China;
J Eye Mov Res. 2025 Mar 10;18(2):6. doi: 10.3390/jemr18020006. eCollection 2025 Apr.
Fixational eye movements are important for holding the central visual field on a target for a specific period of time. In this study, we aimed to quantitatively assess fixational disparities using binocular eye tracking in children with strabismus (before and after surgical alignment) and healthy children. Fixational disparities in 117 children (4-18 years; 57 with strabismus and 60 age-similar healthy controls) were recorded under binocular viewing with corrected refractive errors. Disparities in gaze positions relative to the target location were recorded for both eyes. The main outcome measures included fixational disparities along horizontal and vertical axes in the fixation test. Children with strabismus exhibited significant ( < 0.001) fixational disparities compared to healthy children in both horizontal and vertical directions. Additionally, children with esotropia had poorer fixational function compared to those with exotropia. The occurrence of fixational disparities significantly decreased in the horizontal direction following strabismus surgery. A significant negative correlation was observed between binocular best-corrected visual acuity and fixational disparities in children with strabismus. Children with strabismus had significant fixational disparities that were observably diminished in the horizontal direction after surgical alignment. Binocular assessment of fixational disparities can provide a more comprehensive evaluation of visual function in individuals with strabismus.
注视性眼动对于在特定时间段内将中央视野保持在目标上很重要。在本研究中，我们旨在使用双眼眼动追踪技术对斜视儿童（手术矫正前后）和健康儿童的注视差异进行定量评估。在矫正屈光不正的双眼注视条件下，记录了117名儿童（4至18岁；57名斜视儿童和60名年龄相仿的健康对照）的注视差异。记录双眼相对于目标位置的注视位置差异。主要结局指标包括注视试验中水平和垂直轴上的注视差异。与健康儿童相比，斜视儿童在水平和垂直方向上均表现出显著的（<0.001）注视差异。此外，内斜视儿童的注视功能比外斜视儿童差。斜视手术后，水平方向上注视差异的发生率显著降低。在斜视儿童中，双眼最佳矫正视力与注视差异之间存在显著的负相关。斜视儿童存在显著的注视差异，手术矫正后水平方向上的差异明显减小。对注视差异进行双眼评估可以更全面地评估斜视患者的视觉功能。
