Where does this come from, and can I check it?

Rapid eyelid movements spread tear film across the cornea continuously. The figure is taken from MedlinePlus, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a human body fact?

Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Humans blink up to twenty times every minute to lubricate eyes

Rapid eyelid movements spread tear film across the cornea continuously

An average person blinks roughly 15 to 20 times per minute, totaling over 14,000 blinks daily. Each blink sweeps fresh tear fluid across the ocular surface to moisturise the cornea, clear fine dust particles, and deliver defensive enzymes.

Where this comes from

MedlinePlus

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Eye muscles are the most active muscles in the human bodySix delicate muscles move each eye over one hundred thousand times daily The cornea is one of the few body parts without blood vesselsTransparent eye tissue receives oxygen directly from tears and air The human retina contains over one hundred million light receptorsRods enable dark peripheral vision while cones register fine detail and colour Ciliary muscles alter lens shape instantaneously to focusSmooth muscle accommodation keeps objects clear across varying distances Minor corneal scratches can heal within forty-eight hoursRapid cellular division repairs superficial eye surface abrasions quickly An ostrich eye is larger than its brainOstrich eyes measure five centimetres across, the largest of any land animal.

Tags: eyes, blinking, tears

Humans blink up to twenty times every minute to lubricate eyes: the short answers

Where does this come from, and can I check it?: Rapid eyelid movements spread tear film across the cornea continuously. The figure is taken from MedlinePlus, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a human body fact?: Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.