An image which was posted by a user on Twitter has caused divisions within the social media space. The seemingly harmless photo was posted on the 28th of December with a simple caption “What color is this dress” and since it was posted, over 30 000 replies have been posted.
One end of the media frenzy suggested the dress is purple while others said they saw a blue dress.
The fact that a single image could polarize the entire Internet into two aggressive camps is surprising. But for the past half-day, people across social media have been arguing about whether a picture depicts a perfectly nice dress as blue or purple. And neither side will budge. This fight is about more than just social media—it’s about primal biology and the way human eyes and brains have evolved to see color in a sunlit world.
Light enters the eye through the lens—different wavelengths corresponding to different colors. The light hits the retina in the back of the eye where pigments fire up neural connections to the visual cortex, the part of the brain that processes those signals into an image. Critically, though, that first burst of light is made of whatever wavelengths are illuminating the world, reflecting off whatever you’re looking at.
Without you having to worry about it, your brain figures out what color light is bouncing off the thing your eyes are looking at, and essentially subtracts that color from the “real” color of the object. “Our visual system is supposed to throw away information about the illuminant and extract information about the actual reflectance,” says Jay Neitz, a neuroscientist at the University of Washington. “But I’ve studied individual differences in color vision for 30 years, and this is one of the biggest individual differences I’ve ever seen.”
Source : LiveMonitor