Fraser Spiral Illusion
Estimation 22 March 2012 0 Comments
Do you see a spiral in the image below?
There is no spiral. This drawing consists of a series of concentric circles. This illusion, called the Fraser spiral was discovered by British psychologist James Fraser in the early 20th century.
![1 Star 1 Star](http://www.anopticalillusion.com/wp-content/plugins/wp-postratings/images/stars/rating_on.gif)
![2 Stars 2 Stars](http://www.anopticalillusion.com/wp-content/plugins/wp-postratings/images/stars/rating_on.gif)
![3 Stars 3 Stars](http://www.anopticalillusion.com/wp-content/plugins/wp-postratings/images/stars/rating_on.gif)
![4 Stars 4 Stars](http://www.anopticalillusion.com/wp-content/plugins/wp-postratings/images/stars/rating_on.gif)
![5 Stars 5 Stars](http://www.anopticalillusion.com/wp-content/plugins/wp-postratings/images/stars/rating_on.gif)
![](http://www.anopticalillusion.com/wp-content/plugins/wp-postratings/images/loading.gif)
Tagged in circle, estimation, fraser, spiral, twisted cord