The human retina has three types of cone cells: red, blue, and green. It is precisely because these basic "three primary color visual cells" give animals the ability to perceive colors. However, there are only two types of cone cells in the cat's retina. Green and blue respectively, which results in cats being able to distinguish only a limited number of colors, such as blue, green, gray and yellow. Although the color discrimination ability is poor, it does not affect the life and hunting of cats. In dim light conditions, cats’ vision is much more sensitive than humans. They only need one-sixth of the light received by human eyes to accurately capture The movements and appearance are detailed, and it can adapt well to the life of hunting at night. Therefore, there is no need to worry about whether the cat is color blind, these will not affect its life.