Which glands contribute the lipid layer of the tear film?

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Prepare for the Certified Paraoptometric Assistant (CPOA) Exam. Study with extensive flashcards and multiple choice questions with explanations. Enhance your skills and knowledge to succeed.

Multiple Choice

Which glands contribute the lipid layer of the tear film?

Explanation:
The outer lipid layer of the tear film is produced by sebaceous glands in the eyelids. The Glands of Zeiss are sebaceous glands located at the base of the eyelashes and secrete lipids that contribute to this lipid layer, helping to prevent evaporation and to smooth the tear surface. In contrast, Krause glands are accessory lacrimal glands that mainly supply the aqueous portion; the main lacrimal gland also provides aqueous tears; goblet cells produce mucins for the mucous layer. So, among the options, the Glands of Zeiss are the ones contributing lipids to the tear film's outer layer.

The outer lipid layer of the tear film is produced by sebaceous glands in the eyelids. The Glands of Zeiss are sebaceous glands located at the base of the eyelashes and secrete lipids that contribute to this lipid layer, helping to prevent evaporation and to smooth the tear surface. In contrast, Krause glands are accessory lacrimal glands that mainly supply the aqueous portion; the main lacrimal gland also provides aqueous tears; goblet cells produce mucins for the mucous layer. So, among the options, the Glands of Zeiss are the ones contributing lipids to the tear film's outer layer.

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