The structuralist film movement was over by 1991, the year Ernie Gehr, best known for his structuralist short "Serene Velocity" (1970) made this ten-minute film of the same title as Hitchcock's famous thriller. Comparing the two is impossible to do: the Hitchcock film is obviously a conventional piece of cinema, while this film is a non-narrative experimental short that plays with a single idea within its brief run-time. Additionally, the title of the 1954 movie eluded to a plot element, whereas the re-usage of the title in this one is taken literally in the visuals alone. (I suppose I already said I wouldn't compare the two, but it is an interesting point to make when you take in the identical titles).
Like other experimental films, "Rear Window" plays with the concept of lighting - one which Ernie Gehr himself had experimented with prior to this in "Eureka" (1974). However, that film was basically working with artistic shading, while this one is seeking to create abstract visuals. As the title implies, the film is literally of a window; whether or not it is a rear one is unknown. Out said window the viewer sees glimpses of clothes hanging on a line, buildings, and other things - which are all presented abstractly to create a few neat shots. Nothing exceptional, but a pleasant enough abstraction with enough originality to make it worthwhile.