Optokinetic stimuli: motion sickness, visual acuity, and eye movements.
Optokinetic stimuli: motion sickness, visual acuity, and eye movements.
复制标题
视动刺激：晕动病、视力和眼球运动。
DOI：
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发表时间：
2002
影响因子：
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通讯作者：
M. Griffin
中科院分区：
文献类型：
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作者：
N. A. Webb;M. Griffin
背景
通常假设由移动的视觉场景引起的晕动病起因于自运动的错觉（即，vection）。
假设
这两项研究报告在这里调查是否疾病和vection相关。第一项研究比较了由真实的和虚拟的视觉显示器产生的疾病和传染病。第二项研究调查了抑制眼球运动的视觉固定是否会影响运动病或向量。
方法
在第一个实验中，受试者观看视动鼓和视动鼓的虚拟模拟。第二个实验研究了虚拟显示器上的两种情况：a）移动的黑色和白色条纹;以及B）移动的黑色和白色条纹与静止的十字架，受试者固定在十字架上以减少眼球运动。
结果
在第一项研究中，晕动病的等级在条件（真实的和虚拟的鼓）之间是相关的，就像向量的等级一样。在这两种情况下，视力差的受试者经历了更严重的疾病。在这两种情况下，感染率和疾病率之间没有相关性。在第二项研究中，注视减少了运动病，但对矢量没有影响。运动病与无注视视力相关，而与注视视力无关。同样，在传染病和运动病之间没有相关性。
结论
视动性刺激引起的疾病的主要原因不是向量。向量似乎是受周边视觉，而运动病是受中央视觉。当眼睛可以自由追踪运动刺激时，视敏度和晕动病之间存在关联。虚拟显示器可以产生矢量，并且可以用于研究视觉诱发的运动病。
BACKGROUND
It is commonly assumed that motion sickness caused by moving visual scenes arises from the illusion of self-motion (i.e., vection).
HYPOTHESES
Both studies reported here investigated whether sickness and vection were correlated. The first study compared sickness and vection created by real and virtual visual displays. The second study investigated whether visual fixation to suppress eye movements affected motion sickness or vection.
METHOD
In the first experiment subjects viewed an optokinetic drum and a virtual simulation of the optokinetic drum. The second experiment investigated two conditions on a virtual display: a) moving black and white stripes; and b) moving black and white stripes with a stationary cross on which subjects fixated to reduce eye movements.
RESULTS
In the first study, ratings of motion sickness were correlated between the conditions (real and the virtual drum), as were ratings of vection. With both conditions, subjects with poor visual acuity experienced greater sickness. There was no correlation between ratings of vection and ratings of sickness in either condition. In the second study, fixation reduced motion sickness but had no affect on vection. Motion sickness was correlated with visual acuity without fixation, but not with fixation. Again, there was no correlation between vection and motion sickness.
CONCLUSIONS
Vection is not the primary cause of sickness with optokinetic stimuli. Vection appears to be influenced by peripheral vision whereas motion sickness is influenced by central vision. When the eyes are free to track moving stimuli, there is an association between visual acuity and motion sickness. Virtual displays can create vection and may be used to investigate visually induced motion sickness.