Did you know your eye color is controlled by the level of melanin in your Iris? Brown eyes have more Melanin (a dark brown pigment) in their Iris. Blue eyes have less Melanin, which allows Collagen (which is blue), to show through.
If you have blue eyes, then you share a common ancestor with every other blue eyed person in the world. The first person ever to have blue eyes lived sometime between 6,000 and 10,000 years ago. Before then, all people had brown eyes.
Your eyes contains 107 million cells which are sensitive to light. 7 million “Cones” help you to see color and details. 100 million cells called “Rods” help you to see better in the dark.
Did you know that 20/20 vision just means your vision is “normal”? Eye doctors have determined what people should normally be able to read on a chart from 20 feet away.
If you wore glasses which flipped images upside down, your brain would correct your vision. Although you’d see things upside down for a few days, your brain would eventually adapt, and make sure that you see everything the right way up.
On average, you blink 17 times per minute, 14,280 times in a 14 hour day and 5.2 million times a year. You blink more when talking.
They say “in the blink of an eye” because it is the fastest muscle in your body. A blink typically lasts 100-150 milliseconds. It’s possible to blink 5 times in a single second.
This shows you how wonderful these organs called Eyes are. Treat them well and keep them out of trouble. Going blind isn’t the best of experiences.
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