Endoscopes use optical fibers to provide a picture of the frame. A physician can insert a package deal of optical fibers into the frame. Some carry light into the body, and some convey light pondered off inner body surfaces again out. Other makes use of fiber optics in remedies consist of remote spectrophotometry, strain and function sensing, or scintillation counting. These and different applications, including intravascular strain transducers and in vivo oximeters, are described.