Moon-eye is a term that is used to describe someone who has big, bulging eyes that seem to reflect the light of the moon. However, there are many other synonyms that can be used to describe someone with this distinctive feature. Some of these synonyms include bug-eyed, saucer-eyed, fish-eyed and owl-eyed. Each of these terms has its own unique nuances and connotations, with some suggesting an air of curiosity or wonderment, while others suggest a sense of alertness or intensity. Regardless of which term is used, however, all of them convey the same essential meaning, namely that the person in question has eyes that are large, bright and expressive.