My EYES. H/t this fascinating Quora thread .
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.
coolgifcollection.tumblr.com / Via quora.com
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.
upload.wikimedia.org / wikicommons / Via quora.com
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.
tu-eres-el-unico-para-mi.tumblr.com / Via quora.com
Your peripheral vision is very low-resolution and is almost in black-and-white.
You don't realise it because your eyes move to "fill in" the peripheral detail before you notice the difference.
Thinkstock / quora.com
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