Benefits of retinal image motion at the limits of spatial vision.
Benefits of retinal image motion at the limits of spatial vision.
复制标题
视网膜图像运动在空间视觉范围内的好处。
DOI：
10.1167/17.1.30
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发表时间：
2017-01-01
影响因子：
1.8
通讯作者：
Roorda A
中科院分区：
文献类型：
--
作者：
Ratnam K;Domdei N;Harmening WM;Roorda A
即使在注视过程中，我们的眼睛也在不断运动，在每个感光器中产生不断变化的信号。神经元过程可以利用这种瞬时信号来服务于空间视觉，但我们不知道当面对这种变化时，我们最好的视觉敏锐度如何保持，我们用来破译小字母或识别远处的面孔和物体。我们使用了自适应光学扫描激光检眼镜，以精确地控制时空输入的感光器规模在人类观察者在视觉歧视任务的条件下，习惯性的，取消或以其他方式操纵视网膜图像运动。我们发现，当刺激移动时，敏锐度比没有运动时高出约25%，无论运动是自我诱导的，类似运动的回放还是外部模拟。我们认为，在我们特定的实验条件下，视觉系统是能够合成一个更高的分辨率，从多个视图的一个解决不好的图像，一个假设，可能会扩展目前的理解如何固定眼球运动服务于高敏锐度的视觉。
Even during fixation, our eyes are constantly in motion, creating an ever-changing signal in each photoreceptor. Neuronal processes can exploit such transient signals to serve spatial vision, but it is not known how our finest visual acuity—one that we use for deciphering small letters or identifying distant faces and objects—is maintained when confronted with such change. We used an adaptive optics scanning laser ophthalmoscope to precisely control the spatiotemporal input on a photoreceptor scale in human observers during a visual discrimination task under conditions with habitual, cancelled or otherwise manipulated retinal image motion. We found that when stimuli moved, acuities were about 25% better than when no motion occurred, regardless of whether that motion was self-induced, a playback of similar motion, or an external simulation. We argue that in our particular experimental condition, the visual system is able to synthesize a higher resolution percept from multiple views of a poorly resolved image, a hypothesis that might extend the current understanding of how fixational eye motion serves high acuity vision.