The eyelids serve to protect the eye by warding off foreign bodies and UV radiation. They participate in tear production and distribute the tear fluid. Thus, they contribute significantly to maintaining the surface homeostasis (preservation of optical properties, protection against drying out) of the eye. As a functional unit with the lacrimal drainage system, the eyelids are also responsible for tear drainage. Oculoplastic procedures on the eyelids and TNW present a special situation for patients and practitioners. On the one hand, diseases in these areas lead to high levels of suffering, as they are characterized by severe functional disorders. On the other hand, the structures are located in the central midface, thus directly accessible to optical perception and thereby shape the aesthetic appearance of the person.