25 Weird Facts You Didn’t Know About Eyes

You might only be able to tell red, blue, green and yellow apart, but did you know your eyes can actually distinguish over 10 million different colors? Isn’t that strange?

Or that your iris (the colored bit of your eye) has more unique characteristics than your fingertip? Read on to find out all the weird facts about eyes…

Optophobia is the fear of opening one's eyes Human eyes are so sensitive that on a clear night when there is no moon, a person sitting on a mountain peak can see a match struck 50 miles a way. Every person, including identical twins, has a unique eye and tongue print along with their finger print. If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth. Your eyeball weighs around 30 grams. Your eyes stay the same size throughout your life as they were when you were born - but your nose and ears will continue to grow until the day you die. As you get older, the lens in your eye grows thicker - this is why people who had perfect vision when younger need glasses as they advance in years. Around half the population of the world have eyelash mites - tiny creatures that live on your eyelashes and eat dead skin cells. If you put your eyelash under a microscope, you might just see one! Eyelashes have an average lifespan of five months. Research has found that a tie tied too tightly can increase the risk of glaucoma in men. Blind people can see their dreams as long as they weren't born blind. The cornea is the only tissue in the human body that doesn't contain blood vessels. In an average life, your eyes will see 24 million different images. Eye transplants are currently impossible due to the sensitivity of the optic nerve. Your eye is the fastest contracting muscle in the body, contracting in less than 1/100th of a second. Your iris (the colored part of your eye) has 256 unique characteristics; your fingerprint has just 40. Heterochromia is the medical term for having two different colored eyes. Spectacles had been treating long-sightedness for around for 300 years before anyone could learn to correct short-sightedness. The entire length of all the eyelashes shed by a human in their life is over 98 feet with each eye lash having a life span of about 5 months. Even if no one in the past few generations of your family had blue or green eyes, these recessive traits can still appear in later generations. Each of your eyes has a small blind spot in the back of the retina where the optic nerve attaches. You don’t notice the hole in your vision because your eyes work together to fill in each other’s blind spot. You are likely to blink more often when you are talking. Eyes are made up of over 2 million working parts. Each individual eye contains 107 million cells and all are light sensitive Your eyes are about 1 inch across and weigh about 0.25 ounce.
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