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What is the human world in the eyes of cats?
The binocular vision of a cat is similar to that of a human, which is about 100- 130 degrees, but its monocular vision is much better, up to 280 degrees. We humans can't imagine such a wide field of vision approaching all angles.

Cat's color vision is often ignored. Many people say that cats can only see black and white, which is sheer nonsense! Although not as good as humans, cats can also distinguish limited colors, such as gray and green, blue and yellow.

The ratio of rod cells to cone cells in cats is 25: 1, while that in humans is only 4: 1. Therefore, when switching to night, cats become more sensitive than humans. In the dark, their pupils can expand to 90% of the surface of the eyeball, and the weak light is enough for them to see everything clearly.

PS: A little off topic, human perception of color is insufficient-if compared with birds. Birds have four kinds of cone cells, and the other can sense ultraviolet rays, which makes their world far more beautiful than human beings. Can you imagine what a wonderful world this is, just as it is difficult for us to imagine a four-dimensional space.