我们的眼睛除了能識别物体的大小形狀以外,还能分辨各种颜色。这种分辨颜色的感觉机能就叫做色觉。对人的眼睛來說,宇宙的一切颜色,都可以歸納为紅、綠、蓝三种基本颜色;反过來,把这三种颜色按着不同的比例配合起來,就可以得出其他的各种颜色。这是因为人的眼睛的视網膜有三种感光原質,可以單独感觉紅色、綠色和蓝色,而其他的颜色可以由这三种原質相互联合而感觉出 In addition to identifying the size and shape of objects, our eyes can distinguish colors. This color-resolving sensory function is called color vision. For human eyes, all the colours of the universe can be summed up in three basic colors: red, green, and blue. In turn, by combining these three colors in different proportions, we can come up with others. Colors. This is because the retina of the human eye has three kinds of photosensitizers, which can feel red, green, and blue alone, and other colors can be felt by the three kinds of primitives in conjunction with each other.