ELI5: Explain Like I'm 5

Eyeglass prescription

Eyeglasses are lenses that you wear to help you see things more clearly. Getting eyeglasses means going to the eye doctor to have your eyes checked. After the doctor looks in your eyes, they will write down numbers called an eyeglass prescription. These numbers tell the store which lenses you need to have in your new eyeglasses. The numbers help make sure your new eyeglasses will make things look clearer.