|Definition:|| tool that transfers images using a bundle of optical fibres, used for inside observation of the body which is impossible from the outside directly
Note 1 to entry: Compared with a rigid endoscope consisting of lenses alone, a fibre endoscope is flexible and can be easily bent because thin fibres are bundled, and therefore it is used to see the inside of tubular organs such as digestive tracts and blood vessels. Fibre endoscopes are also used for industrial purposes such as inspection of the inside of pipes and jet engines. With microsurgical tools loaded on the inside of endoscopes, a doctor can perform a surgical operation while observing the diseased part. Research and development for making microsurgical tools is also in progress.