This optical illusion first came into being in 2015 and it still baffles people even today. It begins with two girls. One with a blue and black dress and a second girl with a yellow and white dress. But everything isn’t as it seems. The two dresses can appear to be the same color as the video will demonstrate.
Two years after the infamous debate which divided millions across the web, it has been reignited by a short clip showing a bizarre optical illusion.
In the clip, shared on Korean site Ruliweb, two outfits – one black and blue, and one yellow and white appear to transform before your eyes.
When a small segment is moved from one dress to the other in the animation, although it does not change colour it appears to match the shade of both dresse.
What colour are these two dresses? You might be surprised.
As the segment slides from the black and blue striped outfit towards the yellow and white stripe dress, it suddenly slots into place without an issue.
The illusions appears to work by adding what appears to be a shaded blue box over the yellow dress and a yellow tinted box over the blue dress.
But the confusion over the change in shade is down to how we perceive colour.
Andrew Lotery, Professor of Ophthalmology in the Faculty of Medicine at the University of Southampton, told the MailOnline that the difference in perception could be due to lighting conditions, the device the image is being viewed on and even a person’s age and gender.
He explained that everyone has different combinations of the genes that create the sense of colour for red, green and blue and because these genes are on the X chromosome, women tend to have more variations.
As a result, women have a more dynamic range of colour so may be more susceptible and sensitive to specific colours. This may explain why women flip between seeing the different colours, and men typically don’t.
He added that some people have more than one ‘dose’ of a blue colour gene, as an example, so they will see higher or lower levels of this colour, too.
Are you still confused? Me too but in watching the following video, you might begin to catch on to the illusion.