明暗视觉brightness vision

互联网2013-11-14

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与光的刺激强度，即光的亮度因子有关的视觉。是色视觉的反义词。尤其多指不具有方向视觉乃至形象视觉能力的、被看作是停留在最原始阶段的视觉。这种意义的明暗视觉是以由强度感受器，亦即皮肤光感觉乃至分散光感受器而获得的光感觉为特征，通常只能感受照度的时间变化，并诱发阴影反应和逃避反应等非定位性的分辨反应。如沙海螂的水管和蚯蚓的收缩反应那样，除阴影反应外，有时还可以看到与其相反的照射反应。

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