任何感觉都是由外界刺激所引起的,而光就是引起视觉的外在刺激,在展示环境中的各个展示物体投射到视网膜上,最后视网膜再将信息传递给大脑。就在视网膜上分布着两种感光细胞——杆状体和锥状体,而这两种不同的感光细胞使人有了两套完全不同的视觉系统——明视觉和暗视觉。举个简单的例子,我们在日常生活中会发现,当人处在一个昏暗的环境中,人眼的瞳孔会变大,当人们处在光线充足的环境中时,人眼的瞳孔会缩小,但是无论人们 Any feeling is caused by external stimuli, and light is the external stimulus that causes visualization. Each display object in the display environment projects onto the retina, and finally the retina transmits the information to the brain. There are two types of photoreceptor cells, the rod and the cone, on the retina, and the two different photoreceptors give people two completely different visual systems - bright and dark vision. For a simple example, we find in our daily life that when people are in a dim environment, the pupils of the human eye become larger. When people are in a well-lit environment, the pupils of the human eye shrink, But no matter people