Crichton was fired from writing the screenplay due to the fact that his script did not follow the novel (which he had written) closely enough.
A favorite film of Stanley Kubrick's.
This film is prescient in many aspects of surgical technology that became commonplace in the years and decades after its release - the "spacesuit" operating helmets and gowns that would be common in orthopedic joint replacement surgeries, intraoperative CT scans coupled with stereotactic brain surgery, and electrode implants on and into the brain to treat epilepsy and other conditions.
The Hospital uniforms indicate the wearer's profession as a single letter on the collar: "D" for doctor, "N" for nurse, "T" for technician, etc. They are highly depersonalized in style, with only "dissenting" staff (Dr. Manon and Dr. Ross) showing any hint of individuality in work apparel.
The movie was a critical and commercial failure when released.