27 Feb Unbelievable Facts About the Human Eye
Did you know… Your eyes are almost the same size as they were when you were born. If you’re blind, but were born with sight, you probably still see images in your dreams. Your eye can distinguish between 50,000 shades of grey.
1. Your retinas actually perceive the outside world as upside-down – your brain flips the image for you.
If you want to see the world as your retinas do, try a pair of prism glasses. Just don’t, you know, walk near sheer drops or operate heavy machinery while wearing them.
2. In addition to being upside-down, images arrive at your retina split in half and distorted.
Each half of your brain receives one half of the image, and then they scramble the images together to compose the whole picture you’re used to seeing.
3. Your retinas cannot detect the colour red.
Although your retinas have red, green and blue colour receptors, the “red” receptor only detects yellow-green, and the “green” receptor detects blue-green. Your brain combines these signals and turns them into red.
4. Your peripheral vision is very low-resolution and is almost in black-and-white.
5. Got blue eyes? You share an ancestor with all other blue-eyed people across the world.