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the function of the outer lipid layer of the precorneal tear film
prevents the evaporation of the eye’s tear film.
The glands of Zeis are modified sebaceous glands also located
on the margin of the eyelid.
The function of the glands of Zeis
produce an oily substance that lubricates the hair follicle of the eye lashes
The glands of Moll are on the lid margin and are modified sweat glands. Their secretions contain
the bacteriolytic enzyme lysozyme, mucin 1 and the immunoglobulin A, suggesting a role in local immune defence.
The tear film is made up of three components
the lipid layer, the aqueous layer and the mucoid layer
A deficiency or malfunction of any one of the three components of the tear film can result in
dry eye syndrome.
The conjunctiva is
a thin transparent mucous membrane covering the front portion of the eye (except the cornea).
Sclera
Beneath the conjunctiva is the tough opaque sclera (white of the eye)
the sclera blends with the cornea at the
limbus
Episclera Is
a thin membrane that lies between the conjunctiva and the sclera.
Anterior Chamber
Immediately behind the cornea is the anterior chamber of the eye which contains a crystal clear fluid called aqueous humour.
The function of the Meibomian glands
secrete the outer lipid layer of the precorneal tear film
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