The Art of Vision is an experimental film directed by Stan Brakhage.
This colour silent films reuses footage from Brakhage's Dog Star Man but edited it into a much longer film.
[1] A presentation for retrospective screening of the film explains this difference of treatment of the same material: "The rarely screened magnum opus by Stan Brakhage, an expanded version of his "cosmological epic" Dog Star Man.
That film was made with multilayered superimpositions; in The Art of Vision, each layer is shown separately.
"[2] The Harvard Film Archive presents The Art of Vision as "a monumental work, regarded as one of Stan Brakhage's greatest films.