Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Home > Fraser spiral illusion
The Fraser spiral illusion is the famous spiral after-effect optical illusion based on the "motion after-effect" illusion. This was first described as the Waterfall Effect by 19th Century theorist R Addams . This was later studied in the 1970s by Robert Sekular and Eugene Levinson , who called it "perception of moving targets".
External links
Optical illusions
Read more »