阅读障碍儿童的聚散控制失调
Disordered vergence control in dyslexic children.
作者信息
Stein J F, Riddell P M, Fowler S
机构信息
University Laboratory of Physiology, Oxford.
出版信息
Br J Ophthalmol. 1988 Mar;72(3):162-6. doi: 10.1136/bjo.72.3.162.
Abstract
By means of a synoptophore vergence eye movements were recorded in dyslexic and normal children while they were attempting to track small targets moving in simulated depth. Of the dyslexic children 64% were unable to make proper vergence movements when macular sized fusion targets (2 1/2 degrees) were employed, but their vergence control was better for larger (7 degrees) targets. The normal readers and the remaining dyslexics showed normal vergence responses for both large and small moving fusion stimuli. The results suggest that many dyslexics suffer a disorder of visuomotor control and perception for stimuli falling on the macula; this may explain their characteristic visual problems when reading. Hence recording vergence eye movement responses to small moving fusion stimuli may be useful in the investigation and treatment of children with reading difficulties.
摘要
通过使用同视机，记录了诵读困难儿童和正常儿童在尝试追踪模拟深度中移动的小目标时的聚散性眼球运动。在使用黄斑大小的融合目标（2.5度）时，64%的诵读困难儿童无法做出适当的聚散运动，但对于较大（7度）的目标，他们的聚散控制较好。正常阅读者和其余的诵读困难儿童对大小移动融合刺激均表现出正常的聚散反应。结果表明，许多诵读困难者在黄斑上的刺激的视觉运动控制和感知方面存在障碍；这可能解释了他们阅读时特有的视觉问题。因此，记录对小移动融合刺激的聚散性眼球运动反应可能有助于对阅读困难儿童的调查和治疗。
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