The 1960s saw many significant events including the assassination of President Kennedy in 1963, the rise of British pop/rock music, and the first man going to space in 1961. Op art emerged as an abstract art movement focused on optical illusions and interactions between color. Pioneering op artists included Victor Vasarely, Bridget Riley, and Julian Stanczak. The 1965 Responsive Eye exhibition at the Museum of Modern Art in New York brought attention to op art and its perceptual aspects. Though critics disliked op art, the public embraced it and it began being used in advertisements. Julian Stanczak's art was influenced by his experiences as a refugee from Poland and losing his right arm at a young age.