In daily life, "big eyes" are often used to describe a person's behavior. When a person's eyes are big, it usually means that he is in a good mental state, healthy and lively. On the contrary, when a person's eyes look small and fuzzy, we often feel that he looks a little tired, weak or even listless.
A person's eyes are big and small, but no matter how big or small, they are the windows to see the world. In interpersonal communication, we often judge each other's psychological state through their eyes. Therefore, when we praise other people's big eyes, we are not only describing their characteristics, but also praising and recognizing their inner mental state.