Which gland within the eyelid releases oil onto the surface of the eye to form the tear film?

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Multiple Choice

Which gland within the eyelid releases oil onto the surface of the eye to form the tear film?

The important idea here is that the tear film’s oily layer comes from specialized glands in the eyelids. The Meibomian glands are embedded in the tarsal plates of the eyelids and secret oil (meibum) into ducts that open at the eyelid margin. This oily layer spreads over the tear film and helps prevent evaporation of tears, keeping the eye lubricated and the surface smooth for blinking. The lacrimal gland, in contrast, provides the watery part of tears, while glands like the gland of Zeis lubricate the eyelashes themselves rather than forming the tear film’s oil layer. So the gland that releases oil onto the eye’s surface to form the tear film is the Meibomian gland.

The important idea here is that the tear film’s oily layer comes from specialized glands in the eyelids. The Meibomian glands are embedded in the tarsal plates of the eyelids and secret oil (meibum) into ducts that open at the eyelid margin. This oily layer spreads over the tear film and helps prevent evaporation of tears, keeping the eye lubricated and the surface smooth for blinking. The lacrimal gland, in contrast, provides the watery part of tears, while glands like the gland of Zeis lubricate the eyelashes themselves rather than forming the tear film’s oil layer. So the gland that releases oil onto the eye’s surface to form the tear film is the Meibomian gland.

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