Okay kiddo, so you know how your eyes can change how they focus on things? Sometimes they can get too focused and other times they can't focus enough. Well, cycloplegia is like a medicine that helps your eyes relax and stay really still so that the doctor can check and make sure they are working okay. It's like when you hold really really still so that someone can draw on your face as perfectly as possible. The medicine makes your eyes get extra still so that the doctor can see if you need glasses or if your eyes are healthy. But don't worry, the effects of the medicine don't last forever and your eyes will go back to normal after a little while.