What is the name of the glands in the eyelid that secrete oil?

The glands in the eyelid that secrete oil are called Meibomian glands. These specialized sebaceous glands are located within the tarsal plates of the eyelids and play a crucial role in maintaining the stability of the tear film on the surface of the eye. The oil they produce helps reduce tear evaporation and contributes to the lubrication of the eyelids during blinking. When functioning correctly, Meibomian glands ensure that the surface of the eye remains moist and comfortable, which is essential for visual clarity and eye health.

The other types of glands mentioned have different functions: lacrimal glands primarily produce tears; ciliary glands, which are located at the base of the eyelashes, contribute to the secretion of sweat and oil; and sebaceous glands are broad in function and found in various parts of the body, producing sebum but not specifically within the eyelid structure like Meibomian glands. Understanding the specific roles of these glands is important in the context of eye health and the overall functioning of the visual system.