A low quality<unk>  observing the inside of an antique clock mechanism. Note how individual fibers are discernable, as each fiber only relays one part of the image. A<unk>  is a flexible optical fiber bundle with an eyepiece on one end and a lens on the other that is used to examine and inspect small, difficult-to-reach places such as the insides of machines, locks, and the human body.
Fiberscope
SurgiScope
Stethoscope
Scope 
Endoscope
Carbon dioxide angiography
Angioscopy
Stroboscope