Byrothsis was a substance used to create lenses for infrared cameras and lightsabers. Natural byrothsis was extremely rare and expensive, but Synthetic byrothsis was developed by ResSystem, creating a new industry based on applications of byrothsis. Several technological designs based on the use of byrothsis were condemned to the drawing boards for years until a cheap production method could be found; one the designs to utilize the synthetic byrothsis was the Imperial heat sensor trip.
- Cracken's Rebel Field Guide
- Knights of the Old Republic II: The Sith Lords: Prima Official Game Guide