Aring Eva, Grönlund Marita Andersson, Hellström Ann, Ygge Jan
Institute of Neuroscience and Physiology/Ophthalmology, Sahlgrenska Academy at Göteborg University, Göteborg, Sweden.
Graefes Arch Clin Exp Ophthalmol. 2007 Nov;245(11):1659-65. doi: 10.1007/s00417-007-0585-6. Epub 2007 Apr 24.
The ability to keep steady fixation on a target is one of several aspects of good visual function. However, there are few reports on visual fixation during childhood in healthy children.
An infrared eye-tracking device (Orbit) was used to analyse binocular fixation behaviour in 135 non-clinical participants aged 4-15 years. The children wore goggles and their heads were restrained using a chin and forehead rest, while binocularly fixating a stationary target for 20 s.
The density of fixations around the centre of gravity increased with increasing age (p < 0.01), and the time of fixation without intruding movements increased with increasing age (p = 0.02), while intruding saccades decreased with increasing age (p < 0.01). The number of blinks and drifts did not differ between 4 and 15 years, and there were no significant differences with regard to gender or laterality in any of the investigated variables. No nystagmus was observed.
This study establishes values for visual fixation behaviour in a non-clinical population aged 4-15 years, which can be used for identifying children with fixation abnormalities.
保持对目标的稳定注视能力是良好视觉功能的几个方面之一。然而，关于健康儿童在童年时期的视觉注视情况的报道较少。
使用红外眼动追踪设备（Orbit）分析135名4至15岁非临床参与者的双眼注视行为。孩子们戴着护目镜，头部通过下巴和额头支撑物固定，同时双眼注视一个静止目标20秒。
重心周围的注视密度随年龄增长而增加（p < 0.01），无侵入性运动的注视时间随年龄增长而增加（p = 0.02），而侵入性扫视随年龄增长而减少（p < 0.01）。4岁至15岁之间的眨眼和漂移次数没有差异，在任何研究变量中，性别或侧别方面也没有显著差异。未观察到眼球震颤。
本研究确定了4至15岁非临床人群视觉注视行为的值，可用于识别有注视异常的儿童。
