Amazing Eye Facts

Our eyes are one of the most fascinating and complex parts of the body. How much do we really know about them, and how they work? We rely on them every day, yet we don't give them much thought until something goes wrong and our vision is affected. We've listed 101 interesting facts that you may not know about eyes!

1.In a very basic form, eyes are thought to have first developed in animals around 550 million years ago!
2.You actually see with your brain, not your eyes. Our eyes function like a camera, capturing light and sending data back to the brain.
3.You see things upside down - it is your brain which turns the image the right way up.
4.In a single second, it's possible to blink five times.
5.You are likely to blink more often when you are talking.
6.The eye is the fastest muscle in your body - hence why when something happens quickly, we say 'in the blink of an eye!'
7.A blink typically lasts 100-150 milliseconds.
8.The human eye can function at 100% at any given moment, without needing to rest.
9.Red-eye in photos is caused by light from the flash bouncing off the capillaries in your eyes.
10.If the human eye was a digital camera, it would have 576 megapixels