The Science Behind the Dress Illusion Eyepic Eye Care Gold Yellow One Shoulder Long Sleeve Prom Dresses Sexy Illusion Beading Chic Party Dress Long Vestidos 10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether the dress Neuroscientists Explain Discrepancy Behind "The Dress" Illusion This is just incredible. Both dresses on the shaded area (right side) are identical in color. Here's why people saw the dress differently.