‘Is the dress blue or is it gold?’ Sound familiar? Well, another optical illusion has been doing the rounds on social media, which challenges you to spot numbers in a swirling black and white image.
How many numbers can you spot in the black and white swirls?
This image has a series of numbers hidden within, and the challenge is to see how many you can spot. The illusion was shared on Twitter and is a measure of contrast sensitivity, which allows us to sense the difference between objects and their backgrounds.
According to Vision Center, contrast sensitivity is an important aspect of visual function.
The website explains that “Contrast sensitivity is an important measure of visual function, especially in situations of low light, fog or glare, when the contrast between objects and their background often is reduced. Night driving is an activity that requires good contrast sensitivity for safety.”
But, what is the right answer?
Most people only see a series of numbers 45283 and others only see 528, but the correct answer is 3452839.