Bridget Riley

Bridget Riley, born on April 24, 1931, is an English artist known for being a leading figure of the Op art movement of the 1960’s. 
Op art was part of the countercultural movement of the sixties in the way it challenged artistic standards. Instead of depicting recognizable subject matter, Riley’s artwork is centered on the individual perception or viewing experience of onlookers.1 Riley was an expert at manipulating the space of a canvas to create a certain effect. For instance, many people who view her work experience a disorienting sensation. 
Riley studied at Goldsmiths College and the Royal College of Art, both in London. Her artistic influences include a strand of abstract art called Futurism and some Post-Impressionist artists like George Seurat, who also experimented with visual perception and illusion.2
The majority of Riley’s early works, in the 60’s, use black and white exclusively. Towards the mid 60’s Riley began to integrate color into her works, and in later decades Riley explored how colored geometric shapes could represent the abstract forms of things like music and dance.
In 1968, Riley was the first woman and British person to win the International Prize for Painting. 
Riley continues to create art today.
Sources:
# Google Books: Encyclopedia of the Sixties: A Decade of Culture and Counterculture [2 volumes]
# https://www.ideelart.com/magazine/bridget-riley
Category:Hippies