50 Insane Facts About The Eye

50 INSANE FACTS ABOUT THE EYE Human corneas are so similar to shark Humans and dogs are the only species corneas that they have been used as a known to seek visual cues from another replacement in human eye surgery. individual's eyes, and dogs only do this when interacting with humans. 3 It's impossible to sneeze with your eyes open. 4 Pirates used to An American POW in Vietnam repeatedly wear a gold earring because they believed it would improve their sight. blinked his eyes in Morse Code during a televised interview, spelling out, "T-O-R-T-U-R-E" to signal US military how POWS were being treated. 6. The pupil of your eye expands as much as 45% when you T- U.- 0--- R .-. R.-. E. T- look at someone you love. COLOUR AND LIGHT COLOUR, EYE COLOUR AND LIGHT 8. If your eyes are blue, you 9. All babies are colour blind Our eyes can distinguish between 500 shades of grey. when they are born. share a common ancestor with every other blue-eyed individual in the world! 00halae 10 Each eye contains 107 million cells and all are 11 One in every 12 males is colour blind. 10,000 years ago, everyone's light sensitive. eyes were brown until someone 107,000,000 developed a genetic mutation that made their eyes blue 12 Brown eyes are actually blue underneath 13 There are colours that are too complex the brown pigment and as a result there for the human eye called exists a laser procedure to turn brown eyes blue permanently. "Impossible Colours". 14 About 2% women have a rare genetic mutation that enables them in having an extra retinal cone in their eyes. This 15 Some people are born with two differently coloured eyes This condition is heterochromia. allows them to see 100 million colours. 16 17 The human eye only The world's sees three colours, red, blue and green most common eye colour is all other colours are combination of these. Brown SUPER EYES WHAT MAKES YOUR EYES AWESOME 20 Out of all the muscles in 18 19 While it takes some time for most parts of your body to warm up to their full potential, Your eyes are about 1 inch across and weigh about 8 grammes. your body, the muscles that control your eyes are the most active. your eyes are always active 24/7. Superiar oblique Superior rectus Medial Rectus 1112 1 10 -2 Lateral Rectus 8 Inferior Rectus Inferior oblique 21 22 Your eyes always Each of your eyes has a small blind spot in the back of the retina where the optic nerve attaches. You don't remain the same size notice the hole in your vision because your eyes work once you are born, but your ears and nose will never stop growing. together to fill in each other's blind spot. Optic disc (Bind spot) Optic Nerve 23 Most people think our tears are made of just water but 24 Only one sixth of the human eyeball is exposed. they are far more complex than that. There are 3 main components to our tears and they are fat, mucous and water. This is so the tears won't evaporate. Fatty outer layer Watery middle layer- -Mucus inner layer 25 In an average life, eyes see 24 million 26 The human eye can only make smooth (non-saccadic) motions if it's actually tracking a moving object. different images. 24,000,000 27 While a fingerprint has 40 unique characteristics, an iris has 256. This is why retina scans are increasingly being used for security purposes. 28 Your eyes are comprised of over 2 million working parts to make them fully functional. 2,000,000 •= 1 Unique Characteristic BLINK OF AN EYE BLINKING AND THE SPEED OF THE EYE 29 People say "in the blink of 30 People generally read 25% slower from a computer 31 Eyes can process about 36,000 bits of an eye" because it's the fastest muscle in the body screen compared to paper. information each hour. 36,000 32 Your eye will focus on about 50 things per second. A blink usually lasts 100 to 150 milliseconds and it's possible to blink five times in a second. 33 Eyes heal quickly. With proper care, it only takes about 48 hours for the eye 34 The eyes blink on an average of 17 times per minute, 14,280 times per day and 5.2 million times a year to repair a corneal scratch. 112 48 35 The eye's lens is quicker than any camera's. 1st You blink more when you're talking than while you're reading. 2nd 36 37 Your eyes started to develop only after two weeks you were conceived. The perfect length of eye contact when you first meet someone is about 4 seconds. This is to acknowledge what colour eyes they have. Surface ectoderm Mesenchyme Neuroepithelum Neural Vesicle Lens Retina RPE Optic vesicle Lens Placode Blayered Optic Cup |Photoreceptor cells Inter Neurons Gangtion cells A diagram to illustrate the development of the eye MIND'S EYE HOW THE MIND AND EYES WORK TOGETHER 38 Box jellyfish have eyes with lenses, 39 You see with your brain, not your eyes This may sound obvious but many times blurry or poor vision isn't caused by the eye at all. The poor vision stems from something going wrong in the visual corneas and retinas similar to our own. Despite this, their eyes are permanently out of focus. This is because they don't have a brain, just a ring of nerves around their mouth. cortex of the brain. 40 42 41 Eyes use about 65% of your Those who are blind can The images that are sent see their dreams as long as brainpower, more then any to your brain are actually they weren't born blind. other part of the body! 209AWXƆAA and NB2IDE DOMN DID YOU KNOW COOL FACTS ABOUT THE EYE 43 44 Human eyes are not the most highly evolved. The eyes of the mantis shrimp have four times as many colour The phrase 'it's all fun and games until someone loses an eye' comes from Ancient Rome, as the only rule for their bloody receptors as humans, some of which can see ultraviolet. wrestling matches was 'no eye gouging'. 45 46 47 Research has proven that during a major depression people see less contrast, Each eyelash has a life span of approximately 5 months. The largest eye on the planet belongs to the Colossal Squid, making colours appear duller. and measures around 27cm across. 48 Pirates used eye patches to quickly adjust their eyes from above to below deck, having one eye trained for the bright light, and the other for dim light below deck. 50 The Mayans believe that cross-eyes are 49 Eyes began to develop 550 million years ago. The simplest eyes were patches of photoreceptor protein in single-celled animals. attractive and would make efforts to ensure their children became cross-eyed. SOURCES list25.com/25-crazy-facts-about-your-eyes/ www.vsp.com/eyes.html performanceeyecare.wordpress.com/2012/08/14/25-fun-and-interesting-facts-you-didnt-know-about-your-eyes/ kickassfacts.com/30-kickass-interesting-facts-about-eyes/ www.alterni.com/index.php?option=com_content&view-article&id%3D220 whatthafact.com/interesting-facts-about-eyes/ www.lenstore.co.uk/blog/101-amazing-eye-facts www.timepass.info/post/10-Interesting-Facts-about-Human-Eyes.aspx www.islandcrisis.net/crazy-facts-about-eyes/ www.telegraph.co.uk/men/the-filter/qi/7685621/QI-Quite-Interesting-facts-about-eyes.html lastminute lenses.com