It's no blue dress! It's not Avatar! But it's really freaky!
To see the real image of this weird blue girl, you will need to stare at the white dot on the woman's nose for 15 seconds or more. Then, gaze at the blank space to the right.
Do you see how beautiful this blue woman in reality is? The blank space transforms to a full-color image of a smiling brunette lady. And then, poof, she's gone.
This weird illusion is the result of a negative afterimage.
This negative afterimage illusion was explained by Dr. Juno Kim of the University of NSW School of Optometry and Vision Science.
Humans have three channels for seeing color -- grayscale, red-green and blue-yellow -- that relay information from the back of the eye to the brain, Kim explained.
"When you look at something that, for example, is yellow for a long period of time, you stimulate the cells that are positively sensitive to yellow," he said.
But if those cells become over-stimulated -- say, from 15 seconds of staring at a fixed point -- then they won't immediately return to a normal state.
"When you then direct your gaze at a uniform background... the cell doesn't return to its resting activity, it goes much lower than that," Kim told the Mail.
In this case, the blue receptors in your eyes become fatigued, which then makes it easier to perceive the yellow tones you might see in the illusion of the woman's face.
Did you really see the woman or not? Comment below.
