The eyelids is the major protection of the eye balls, which consist of 5 layers: skin layer, subcutaneous layer, muscle layer, tarsal plate and tarsal conjunctival layer.

• 眼睑是眼球的主要安全保护屏障，能遮盖眼眶出口，覆盖眼球前部。分5层：皮肤层，皮下组织层，肌层，睑板层，睑结膜层。