When you blink, tears move across the surface of the eyeball to do what?

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Study for the Glencoe Health Exam. Prepare with interactive flashcards and multiple-choice questions. Each question includes hints and detailed explanations. Get ready for your health exam!

Multiple Choice

When you blink, tears move across the surface of the eyeball to do what?

Explanation:
Blinking spreads tears across the eye to keep it moist and clean. As you blink, tears form a thin film that coats the cornea and the inner surface of the eyelids, lubricating the eye and washing away dust and debris. This tear film also contains enzymes that help protect against infections and helps maintain a smooth surface for clear vision. So the primary purpose of tears moving across the surface is to moisten and cleanse the eye, rather than changing color, moisturizing the eyelids specifically, or warming the eye.

Blinking spreads tears across the eye to keep it moist and clean. As you blink, tears form a thin film that coats the cornea and the inner surface of the eyelids, lubricating the eye and washing away dust and debris. This tear film also contains enzymes that help protect against infections and helps maintain a smooth surface for clear vision. So the primary purpose of tears moving across the surface is to moisten and cleanse the eye, rather than changing color, moisturizing the eyelids specifically, or warming the eye.

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