Question

Why do we blink our eyes?

Answer 1

We know our eyes contain fluid

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when we blink our eyes this liquid recharges . When we blink our eyes our eyelids spread some oil which keeps the eye safe from dust and this oil prevents eyes from drying.  

Answer 2

Answer:

Every time you blink, your eyelids spread a cocktail of oils and mucous secretions across the surface of the eye to keep your globes from drying out. Blinking also keeps eyes safe from potentially damaging stimuli, such as bright lights and foreign bodies like dust.

Explanation:

Hope it helps <3

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