ANATOMY The eyelids are two fibromuscular structures: outer layer containing skin, muscle as well as dense fibrous tissue and an inner transparent layer called conjunctiva that close in front of the eyeball, hence protecting it.

外层包括皮肤、肌肉和密集的纤维组织，内层叫做结膜的透明层在眼球前面闭合，从而保护眼球。