Op, Minimalism, and Post Minimalism

Op Art
Think back to my lecture on the Bauhaus. Remember how they offered a barrage of interesting classes? One of them was taught by László Moholy-Nagy and utilized photography techniques as well as more remedial lessons like poking holes in cards and moving them over images to create effects. From Bauhaus, as well as DaDa, Constructivism, and Cubism influences, a new movement emerges called Op Art (Optical Art).
The term Op Art is coined by Time magazine in response to Julian Stanczak's exhibition Optical Paintings which debuted in 1964 at the Martha Jackson Gallery. In basic terms it is a form of abstract art (specifically non-objective art) that uses optical illusions. There are works that are retroactively described as Op Art that were made earlier than 1964. The most famous artist associated with this movement is Bridget Riley.
Minimalism
In visual arts, music, and other mediums, minimalism is an art movement that began in post-World War II Western art, most strongly with American visual arts in the 1960s and early 1970s.
Prominent artists include Agnes Martin,Carmen Herrera, Donald Judd, Robert Ryman, Isamu Noguchi, Tony Smith, and Dan Flavin.
Post-Minimalism
In visual art, postminimalist art uses minimalism either as an aesthetic or conceptual reference point. Postminimalism is more an artistic tendency than a particular movement. Postminimalist artworks are usually everyday objects, use simple materials, and sometimes take on a "pure". formalist aesthetic. However, since postminimalism includes such a diverse and disparate group of artists, it is impossible to enumerate all the continuities and similarities between them.
In a 1966 New York exhibition called Eccentric Abstraction, critic Lucy Lippard curated a work by a group of artists including Eva Hesse, Louise Bourgeois, and Bruce Nauman. The pieces often combined unusual soft and pliable materials. Some borrowed the modular, repetitive compositions typical of minimalism, but many also exploited more relaxed and open structures. This exhibition, in my mind, marks the beginning of Post-Minimalism.
Major artists associated with this movement are Eva Hesse, Louise Bourgeois, Louise Nevelson, and Richard Serra.