ACCOMMODATION AND APPARENT DISTANCE
ACCOMMODATION AND APPARENT DISTANCE
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DOI：
10.1068/p170609
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发表时间：
1988-01-01
期刊：
影响因子：
1.7
通讯作者：
CIUFFREDA, KJ
中科院分区：
文献类型：
--
作者：
FISHER, SK;CIUFFREDA, KJ
判断自我中心距离的能力在16名正常观察者中进行了评估，在这种情况下，单眼模糊驱动的调节提供了关于目标屈光距离变化的唯一信息来源。在2到6 D的光学范围内，对三个不同的目标进行调节和视距离测量，这些目标作为调节刺激的效果不同（优秀、中等和差）。对于优良和中等调节目标，视距离随调节的增加而减小，两者具有共同的线性函数。视距离往往超过可容纳距离，尺度上相对压缩。正如预期的那样，调节反应和视距离随着目标有效性的降低而减少。调节目标差是调节不偏离主力线，视距离保持不变的极限情况。受试者之间在根据适应性判断距离的能力上存在相当大的差异。研究结果表明，住宿确实可以作为距离信息的来源，尤其是对某些个体而言。
The ability to judge egocentric distance was assessed in sixteen normal observers under conditions where monocular blur-driven accommodation provided the only source of information regarding changes in target dioptric distance. Accommodation and apparent distance were measured over an optical range of 2 to 6 D for each of three targets which differed in their effectiveness as accommodative stimuli (excellent, moderate, and poor). For the excellent and moderate accommodative targets, apparent distance decreased as accommodation increased, with both targets sharing a common linear function. Apparent distance, however, tended to exceed accommodative distance and was relatively compressed in scale. As expected, accommodative response and apparent distance diminished in range as target effectiveness was reduced. The poor accommodative target represented the limiting case wherein accommodation failed to deviate from the tonic level, and apparent distance remained constant. There were considerable intersubject differences in the ability to judge distances on the basis of accommodation. The results indicate that accommodation can indeed serve as a source of distance information, particularly for some individuals.