The structure of the retina in cats' eyes is different from that of humans. They have more rod cells and fewer cones, making their vision better suited for hunting in low-light environments. Therefore, cats have relatively weak ability to recognize colors, especially red and green.
However, the water in the white bowl is invisible to cats due to its ability to reflect light. The shape and position are still visible. So cats can see water in a white bowl, but they may not be able to discern the color of the water as clearly as humans.
