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Certified Ophthalmic Medical Technologist (COMT)

Category - COMT

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Which of these describes the function of the tear film?

Lubrication of the cornea
Protects the eye from infection.
Provides a smooth surface for refraction
All of the above

Explanation

Answer: D - The tear film lubricates the cornea, protects the eye from infection, and provides a smooth surface for refraction.

The tear film is composed of 3 separate layers and covers the complete front surface of the eye. In addition to the functions listed, the tear film also oxygenates the cornea and helps remove debris.

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