Calkins D J
Department of Ophthalmology, University of Rochester Medical Center, New York 14642, USA.
J Opt Soc Am A Opt Image Sci Vis. 2000 Mar;17(3):597-606. doi: 10.1364/josaa.17.000597.
Vision begins with specialized retinal circuits that encode diverse types of information. For Old World primates, these circuits sample three submosaics formed by cone photoreceptors sensitive to short, middle, and long wavelengths. For spatial acuity, the photon catch between any two cones is compared for discrimination of patterns as fine as the cone mosaic. For color vision, the photon catch between different cone types is compared for discrimination of fine spectral differences on the basis of hue. The retinal circuits for these two tasks differ at the synaptic level to form distinct representations of signals from the cone mosaic.
视觉始于专门的视网膜回路，这些回路对多种类型的信息进行编码。对于旧世界灵长类动物来说，这些回路对由对短、中、长波长敏感的视锥光感受器形成的三个亚镶嵌进行采样。对于空间敏锐度，比较任意两个视锥之间捕获的光子，以辨别精细到视锥镶嵌程度的图案。对于色觉，比较不同视锥类型之间捕获的光子，以基于色调辨别精细的光谱差异。这两项任务的视网膜回路在突触水平上有所不同，从而形成视锥镶嵌信号的不同表征。
