In both posters and newspaper ads, with taglines like "You can't always believe what you see..." Faye Dunaway's face appeared a little bit at a time, beginning just with the over-bright image of her eyes, and the rest of the facial features appearing in subsequent ads, until the face was featured completely in the final poster.
Principal photography on this picture was a "closed set" to all non production personnel. Reportedly, producer Jon Peters threatened dismissal to anyone who revealed any of the script's critical or important story elements.
On-set rifts between producer Jon Peters and his cast and crew, particularly with lead star Faye Dunaway, were well publicized in the media. The relationship between Dunaway and Peters during filming has been described as being tense and strained.
According to director Irvin Kershner, the brief moment in which Laura walks into her warehouse studio office and opens the window overlooking featured a glaring continuity error that required post-production lab work to fix. The wide shot of Laura at the window was cold in tone, while the medium shot was much warmer. Allegedly, editor Michael Kahn resorted to gradually altering and "warming up" the tone of the wide shot to better match the color temperature of the medium shot that follows. (For those who notice, this explains why the central area of the wide-shot suddenly shifts in color temperature.)
The spec script that John Carpenter sold producers was simply entitled "Eyes." It was extensively rewritten, the ending (and the killer's identity) was changed, and he had nothing to do with the final product, issued just months prior to his own breakout hit "Halloween."
In the film's prologue, the "author" photograph of Faye Dunaway glimpsed on the inner dust jacket of the prop book "The Eyes of Mars" is from a 1977 sitting with American photographer Francesco Scavullo (1921-2004).