湖南省襄樊市葛菡小朋友问:人的视觉是所有动物中最好的吗?人在水里的视觉不如鱼,在夜间的视觉不如猫,也没有鹰眼望得远。虽然如此,我们仍然要说:“人的视觉是最优秀的!”人既能极目千里,用肉眼看到1500光年之外的猎户座大星云,又能于咫尺之内明察秋毫。人眼看东西有立体感,在 Ge Wei, a friend of Xiangfan City, Hunan Province, asked: Is the human vision the best among all animals? The human vision in the water is not as good as the fish. At night, the vision is not as good as that of a cat and there is no eagle eye. In spite of this, we still have to say: “The human vision is the best!” People can not only see a thousand miles, but also see the Great Orion Nebula 1,500 light years away. People see things with three-dimensionality,