Visuospatial attention has an inherent asymmetry: the leftward bias called pseudoneglect. In typical line bisection tasks, healthy individuals tend to judge the center of a line leftward of the true center, an effect attributed to the right hemisphere dominance in visuospatial attention. Since it has been shown that information perceived by the dominant eye strongly activates the ipsilateral visual cortex, we hypothesized that eye dominance may modulate visuospatial attention bias. Because activation of the left hemisphere induced by left eye dominance should mitigate the right hemisphere dominance in attention, we predicted that right-handed individuals with left dominant eye would show smaller amount of pseudoneglect than right-handed individuals with right dominant eye. We compared the performance at both the perceptual (Landmark) and manual line bisection task of forty right-handed healthy individuals, half of whom had a right dominant eye and the other half a left dominant eye. As predicted, the left eyed dominant group showed smaller, actually not significant pseudoneglect, which was thus greater in the right eye dominant group. The influence of eye dominance on visuospatial attention was present in the Landmark but not the manual line bisection task, in which the amount of visuospatial bias correlated with participants' degree of (right) handedness. This is the first report of the effect of eye dominance on visuospatial attention within a right-handed population. This finding, by showing the influence of eye dominance on visuospatial cognition, not only helps in better defining intact visuospatial cognition mechanism but also encourages further research to pinpoint the neural basis of such interaction.

中文翻译：

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眼睛的优势调节了视觉空间的注意力。

视觉空间注意力具有内在的不对称性：向左偏斜称为伪忽视。在典型的线平分任务中，健康的个体倾向于判断线的中心位于真实中心的左侧，这种效果归因于视觉空间注意中的右半球优势。由于已经显示出优势眼感知到的信息会强烈激活同侧视觉皮层，因此我们假设眼睛的优势可能会调节视觉空间注意力偏向。因为左眼优势引起的左半球激活应减轻注意力中的右半球优势，所以我们预测具有左优势眼的右撇子个体将显示出比具有右优势眼的右撇子个体更少的假忽略。我们比较了四十名右撇子健康个体在知觉（Landmark）和手动线平分任务上的表现，其中一半拥有右优势眼，另一半则具有左优势眼。如预测的那样，左眼优势群体表现出较小的，实际上不明显的假性忽视，因此在右眼优势群体中更大。视觉优势对视觉空间注意的影响存在于Landmark中，但不存在手动线平分任务，其中视觉空间偏倚的量与参与者的（右）手性程度相关。这是右撇子族群中优势眼对视觉空间注意力的影响的首次报道。通过显示眼睛优势对视觉空间认知的影响，该发现