Endoscopy means looking inside and typically refers to looking inside any object for its non-accebality.
This is done by using an instrument called an endoscope.
This is particularly used by doctors for examination inside a human body.
Endoscopy can also refer to using a borescope in technical situations where direct line-of-sight observation is not feasible.
How done[]
Endoscopy is used to assess the interior surfaces of any object by inserting a tube into the equipment. The instrument may have a rigid or flexible tube and to provide an image for visual inspection and photography for further action.
In the case of engineers[]
It provides a visual image of the inside of a machinery, for further action.
In the case of doctors[]

A flexible endoscope.
In the case of doctors, where it is mostly used, for examination of a living body, it also enables taking biopsies and retrieval of foreign objects.
Discomforts[]
Many endoscopic procedures for use on living beings are considered to be relatively painless and, at worst, associated with mild discomfort.
Equipment components[]
An endoscope can consist of a rigid or flexible tube, (made for a specific purpose), with a light delivery system to illuminate the part or object under inspection.
The light source is normally outside and the light is typically directed via an optical fiber system. A lens (optics) system will transmit the image to the viewer from the fiberscope.
Uses[]
Endoscopy can involve many uses for engineers and surgeons.
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