Fastest muscle in the body: The muscles that control your eye movements are the fastest in your body, allowing you to blink in as little as 100–150 milliseconds
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Unique like fingerprints: Your iris has a unique pattern that is different from anyone else's, making it an ideal tool for biometric identification
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You blink around 20,000 times a day: On average, humans blink about 15–20 times per minute, which adds up to approximately 20,000 blinks a day
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The eye heals quickly: The cornea, the transparent front part of the eye, can repair itself within 24–48 hours after a minor scratch or injury
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The only organ to function at 100% capacity: Eyes are always active, even when you're sleeping—they continue sending information to your brain
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Peripheral vision is mostly black and white: The edges of your vision, or peripheral vision, are less sensitive to colour because there are fewer cone cells in that area of the retina
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Your eyes can distinguish 10 million colours: The human eye is incredibly sensitive and can differentiate about 10 million shades of colour, thanks to its cone cells
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The retina processes images upside down: When light enters the eye, the retina processes the image upside down
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You see with your brain, not your eyes: While your eyes capture light, it's your brain that processes the visual information and allows you to “see”
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Eyes don't grow much after birth: Unlike most body parts, your eyes are nearly the same size at birth as they are in adulthood