"Dry your eyes" is a common phrase that is used to comfort someone who is feeling sad or upset. However, there are many different ways to express this sentiment using synonyms. For example, one could tell someone to "brush away your tears" or "wipe your eyes clean." Other options include "cheer up," "stay strong," or "keep your chin up." Ultimately, the goal is to let the person know that you are there for them and that you care about their feelings. Whether you choose to use the phrase "dry your eyes" or one of its synonyms, the important thing is to convey empathy and support.