28/07/2020
101 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.
11.On average, you will blink approximately 4,200,000 times in a single year.
12.We have two eyeballs in order to give us depth perception – comparing two images allows us to determine how far away an object is from us.
13.Eyes heal quickly. With proper care, it takes only about 48 hours to repair a minor corneal scratch.
14.The world’s most common eye colour is brown.
15.The first blue-eyed person is said to have lived 6,000-10,000 years ago.
16.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.
17.Blue-eyed people share a common ancestor with every other blue-eyed person in the world.
18.During a sight test, health conditions including diabetes and high blood pressure can be detected.
19.Diabetes is the number one cause of blindness in adults in the UK.
20.Research has found that a tie tied too tightly can increase the risk of glaucoma in men.
Next 20 to follow.....