Cách sử dụng
The eyelid is a small piece of skin that covers your eye. It protects your eye from dust and other things that could harm it. You use your eyelids when you blink, which is when you close your eyes quickly and then open them again. You can also use your eyelids to help you sleep by closing them and keeping out any light. The word 'eyelid' is often used when talking about eye health or when describing facial expressions, such as when someone is tired and their eyelids droop.