A cat’s eyes, that is, black pupils, can change according to the weather and mood. If the cat’s eyes become round, it means that the sunlight at this time is weak and not dazzling, and the cat can see clearly; and the cat is relaxing, The eyes will also become round when they are comfortable or angry; in addition, when the cat is curious, playful, and staring at one place carefully, the eyes will also become round.