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almost 5 years ago
Blinking of eye is necessary to spreading of lacrimal fluid in on our eye and prevent from it drying.
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How it occurs: The blink reflex also known as corneal reflex helps you to keep foreign bodies out of your eye. It also spread the fluid and therefore lubricates the eye. The nasociliary branches coming off of the ophthalmic devision of CN5 sense dryness or irritation. The cranial nerve 7 initiates then the motor response after its relay in the brainstem nucleus.
almost 5 years ago
Also, the enzymes in lacrimal fluid kill microorganisms. It is a part of natural defence mechanism.