Before Brian De Palma became a narrative film maker he made documentaries. Among them is The Responsive Eye, which chronicles the Museum of Modern Art’s 1965 exhibition of op-art. Curated by William Seitz, this was the first significant exhibit of optical art synchronous with and in some cases arising out of the early days of psychedelic culture. It’s amusing to watch the stuffed shirts within the art world attempt to describe what they are looking at in conventional terms or resorting to psychological mumbo jumbo without ever mentioning mescaline or LSD.

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