Tweet this video! - http://clicktotweet.com/hc5a7 "The eyes are the windows to the soul" as one well known saying goes. However, there's just more to the eyes than, well, meets the eye. They allow us to see, first and foremost, as well as allow us to distinguish shapes and sizes at first glance (literally). They also help us recognize our friends and our loved ones. What your eyes do isn't just limited to these though; so here are 25 crazy facts about your eyes. https://twitter.com/list25 https://www.facebook.com/list25 http://list25.com/ Check out the text version too! - http://list25.com/25-crazy-facts-about-your-eyes Here's a preview: Eye color can change If your eyes are blue, you share a common ancestor with every other blue-eyed individual in the world Each eye contains 107 million cells and all are light sensitive 20/20 vision = normal vision If you wear glasses that flip images upside down, your brain corrects your vision The eyes blink on an average of 17 times per minute, 14,280 times per day and 5.2 million times a year People say "in the blink of an eye" because it's the fastest muscle in the body You'll need reading glasses when you're older The eye's lens is quicker than any camera's Blinking happens to be an enormously important eye function Everybody gets cataracts as they get older Diabetes is often first detected during an eye exam You see with your brain, not your eyes Your eyes can adapt to blind spots 20/20 vision is not the best vision Your eyes water when they're dry Eyes heal quickly Newborns don't produce tears Doctors have yet to find a way to do eyeball transplants Eye measurements Heterochromia Eye muscles Working parts Shark eyes Curable conditions