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1928 Lancet 3 Mar. 442/2 The law governing stereofluoroscopy has not been fully recognised. The law stated simply is that angles of vision which the X rays make with the body should be identical with those made by the vision of the observer of the body... Early in the days of X rays the tubes were of a size which rendered stereofluoroscopy impossible.

1964 Radiology 82 125 A test of depth perception in 62 subjects strongly suggested that binocular stereofluoroscopy provided an advantage in the perception of depth over the clues available from motion parallax alone.