DISPARITY-INDUCED AND BLUR-INDUCED CONVERGENCE EYE-MOVEMENT AND ACCOMMODATION IN THE MONKEY
DISPARITY-INDUCED AND BLUR-INDUCED CONVERGENCE EYE-MOVEMENT AND ACCOMMODATION IN THE MONKEY
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DOI：
10.1152/jn.1986.55.5.896
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发表时间：
1986-05-01
影响因子：
2.5
通讯作者：
JUDGE, SJ
中科院分区：
文献类型：
--
作者：
CUMMING, BG;JUDGE, SJ
在两只猴子中研究了聚散眼运动和眼调节的动力学，这些猴子被训练来跟踪似乎在深度移动的单倍镜呈现的目标。该目标是在四种条件下提出的：单眼观看，正常的双眼观看，双视开环，和“冲突”观看，其中的调节和聚散刺激不对应于在三维空间中的任何真实的目标所产生的。之所以选择第一和第三个条件，是因为在每种情况下，引导调节和聚散的两个主要线索中只有一个起作用：第一种情况下是模糊，第三种情况下是视差。我们通常研究的反应明显的目标运动直接朝向或远离右眼，其中调节进行了测量。在两个猴子的调节反应的lavelian步骤约为180和240毫秒，而在这两个猴子的lavelian的收敛约为160毫秒。无论是聚散lavelian，也不适应lavelian有很大的不同，在单眼和双眼观看。在上述观察条件的前三个条件下，研究了对正弦运动目标（频率0.1-1.2 Hz;峰-峰幅度0.5-4屈光度或米-角）的响应。在双眼观看，即使与调节开环，聚散和调节表现出更小的相位滞后比单眼观看。此外，在响应阶跃变化，无论是聚散和调节速度较高，在双眼观看比在单眼观看。因此，聚散度和调节的动态控制主要依赖于视差信号。在低频率（0.2或0.3赫兹）的猴子表现出只有适度的能力，分开他们的住宿和聚散反应时，提出了冲突的模糊和差异线索。基于上述数据的简单线性计算用于预测这种情况下的响应。预测和观察到的反应是在合理的协议。
The dynamics of vergence eye movement and of ocular accommodation were studied in two monkeys trained to track a haploscopically presented target that appeared to move in depth. The target was presented under four conditions: monocular viewing, normal binocular viewing, accommodation-open-loop binocular viewing, and "conflict" viewing, in which the accommodation and vergence stimuli did not correspond to those produced by any real target in three-dimensional space. The first and third conditions were chosen because in each case only one of the two primary cues that guide accommodation and vergence was operative: blur in the first case and disparity in the third. We usually studied responses to apparent target movement directly toward or away from the right eye, in which accommodation was measured. The latencies of the accommodation responses to steps toward the monkey were approximately 180 and 240 ms in the two monkeys, while in both monkeys the latencies of convergence were approximately 160 ms. Neither the vergence latencies nor the accommodation latencies were greatly different in monocular and binocular viewing. Responses to a sinusoidally moving target (frequencies 0.1-1.2 Hz; peak-to-peak amplitude 0.5-4 diopters or meter-angles) were studied in the first three of the above viewing conditions. In binocular viewing, even with accommodation open-loop, vergence and accommodation showed much smaller phase lags than in monocular viewing. Furthermore, in response to step changes, both vergence and accommodation velocities were higher in binocular viewing than in monocular viewing. Thus the dynamic control of both vergence and accommodation relies predominantly on disparity signals. At low frequencies (0.2 or 0.3 Hz) the monkeys showed only a modest ability to separate their accommodation and vergence responses when presented with conflicting blur and disparity cues. A simple linear calculation based on the data above was used to predict the responses in such situations. The predicted and observed responses were in reasonable agreement.