When Yorkshire hosted the 2014 Grand Départ of the Tour de France, 2.5m people lined the route over two days. Building on the success of that event, there is now an annual Tour de Yorkshire cycle race.
The sight of static colourful bicycles dotted around towns and villages and showing off their vibrant flower baskets has become the norm.
Recently I took photographs of two bikes near my home. Take a close look at the green one. At first glance there appears to be nothing unusual about it. Look again, focus towards the top of the front wheel and tell me what you see!
Post Edit – It appears (or not appears) to be an elusive illusion for some of you. Focus and stare at the front wheel of the green bike, squint if necessary, it may help.
Can you see it? What you see is there and what you see is not. What is real is real and what is not is not, but can you see it? ~ S.W.
An illusion is proof that you don’t always see what you think you do and it’s because of the way your brain and your visual system perceive and interpret an image.
There are a number of reasons why some of us see a visual illusion and others do not. Illusions occur due to the properties of the visual areas of our brains, the way they receive and process information. Your perception of an illusion has more to do with how your individual brain works and much less to do with the optics of your eye.
According to Changizi, author of The Vision Revolution –
“When the brain attempts to generate a perception, it basically is taking a guess at the near future by trying to fast-forward a tenth of a second. As a result of this “neural delay,” you might not be perceiving an image as it actually is, but as you expect it might soon be.”
Colour, motion, shape and the amount of light that hits your eye are just a few of the factors that might cause you to see an illusion.”
Article written in response to the weekly photo challenge ‘Unusual‘