IRIS Group, Physiopathologie de la Vision et Motricité Binoculaire CNRS FR3636, Université Paris Descartes, Paris, France.
Sci Rep. 2019 Feb 4;9(1):1247. doi: 10.1038/s41598-018-37778-y.
Interaction mechanisms between cognition and binocular motor control in reading saccades remain unclear. In this study we examine objectively saccades and fixations parameters during the Stroop test, involving three different levels of cognitive demand (reading, color denomination and interference). In addition, we experimentally induce accommodation and vergence conflicts during the different tasks. Twenty-one visually normal subjects (age 20.9 ± 1.45) performed the Stroop test in three different randomized conditions: a control normal viewing condition, a 16Δ base-out prism condition, and a -2.50D spherical lenses condition. Prisms and spherical lenses induced Vergence-Accommodation conflict. Eye movements were recorded with the Eyeseecam video-oculography device. The results show (1) longer fixation duration in the interference task than in the denomination task, and shorter fixation duration in the reading task; (2) a higher interference effect in the conflict induced conditions compared to the control condition; (3) a lower tolerance to prism induced conflict, with a higher destabilization of the binocular motor control of saccades and fixations. This suggests an interplay between vergence accommodation conflict and cognitive load: tolerance to the conflict seems to be lower in the more cognitively demanding interference Stroop task. The results consolidate the link between cognition and high quality of single binocular vision.
在阅读扫视中，认知与双眼运动控制之间的相互作用机制仍不清楚。本研究通过客观检查斯特鲁普测试中的扫视和注视参数，考察了三个不同认知需求水平（阅读、颜色命名和干扰）下的情况。此外，我们在不同任务中实验性地诱发调节和聚散冲突。21 名视力正常的受试者（年龄 20.9±1.45 岁）在三种不同的随机条件下完成了斯特鲁普测试：正常观看控制条件、16Δ基底外向棱镜条件和-2.50D 球镜条件。棱镜和球镜会诱发聚散-调节冲突。使用 Eyeseecam 视频眼动记录设备记录眼动。结果表明：（1）干扰任务的注视持续时间长于命名任务，阅读任务的注视持续时间短；（2）与对照条件相比，在冲突诱导条件下的干扰效应更高；（3）对棱镜诱导的冲突的耐受性较低，与扫视和注视的双眼运动控制稳定性降低有关。这表明调节-聚散冲突与认知负荷之间存在相互作用：在认知要求更高的干扰性斯特鲁普任务中，对冲突的耐受性似乎较低。结果巩固了认知与高质量双眼单视之间的联系。
