GROSS ANATOMY

Detailed explanation-1: -Glands of Zeis are unilobar sebaceous glands located on the margin of the eyelid. The glands of Zeis service the eyelash. These glands produce an oily substance that is issued through the excretory ducts of the sebaceous lobule into the middle portion of the hair follicle.

Detailed explanation-2: -The glands of the eyelid are: i) meibomian glands – in the tarsal plate. Their secretion forms the oily part of the tear film. ii) glands of Zeis – sebaceous glands that open into the follicles of the eyelashes.

Detailed explanation-3: -Glands of Moll and Zeis secrete sebum that keeps lashes supple. The glands of Moll are prone to infection and blockage of its duct with sebum and cell debris. Blockage of the gland’s duct causes swelling which can manifest itself as a stye.

Detailed explanation-4: -Meibomian glands are essential pieces of the homeostatic machinery that keep the ocular surface clean, healthy and well-lubricated. Dysfunction of these glands is a common disorder, with a widespread prevalence of 39 to 50 percent of the population that increases with age.