Y: Nothing in your peripheral vision should have any color? Why not?
周边视野范围内是没有颜色?为什么?
D: Because color is what we perceive when light of a particular frequency meets conesspecial cells in your retina. But the light being reflected off the door is only landing on the outside edge of your retina. And there are almost no cones on the edges. Everything we see roughly seventy-five degrees away from the point were fixed on should be black and white.
因为,当特定波长的光线作用于视锥细胞时我们所接收到的便是颜色。但是,从门上发射出来的光线仅能到达视网膜的外缘,在视网膜的外缘几乎没有视锥细胞。从我们所凝视的方向斜75度角所看到的所有东西都只能是黑白的。
Y: Thats fascinating! But why is the door still green?
太神奇了!可为什么门还是绿色的呢?
D: Presumably the door remains green because vision isnt a simple matter of retinal cells. All thedata your eyes send is interpreted by the brain. Your brain knows that the door is green, so it supplies information that isnt really there to keep the image stable.
门一直保持绿色大概是因为我们的视觉并不仅仅是视网膜细胞所能控制的吧。由眼睛传送的所有信息都是经过大脑编译的。大脑所给出的信息是:门是绿色的。因而,大脑传送出了并未遵循图像的信息。
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