In the 1960s and 1970s Craig-Martin was particularly interested in American Minimalism and Conceptualism. By the 1980s his work had become concerned with Pop imagery and style. A major change came immediately after Craig-Martin returned from a year’s sabbatical in New York in 1982, when he started to make wall drawings which were three-dimensional. With the inclusion of coloured panels, the result was bold relief sculptures which retainined a strong graphic element. Craig-Martin commented that the bold line of works such as ‘Glasses’ “generalises the object, gives it the diagrammatic quality you refer to… I want my pictures of objects to look as much like unadulterated facts as the objects themselves.”