Editing Endoscope (section)

== Composition ==
[[File:Insertion_tip_of_endoscope.jpg|thumb|The insertion tip of an endoscope]]
A typical endoscope is composed of following parts:

* A rigid or flexible tube as a body.
* A light transmission system that illuminates the object to be inspected. For the light source, it is usually located outside the scope body. 
* A lens system that transmits the image from the [[objective lens]] to the observer, usually a [[relay lens]] system in the case of a rigid endoscope or a bundle of optical fibers in the case of a [[Fiberscope|fiberoptic endoscope]].
* An [[eyepiece]] which transmits the image to the screen in order to capture it. However, modern [[videoscope (testing equipment)|videoscope]]s require no eyepiece.
* An additional channel for [[Medical device|medical instruments]] or manipulators (only for a multi-function endoscope, see below in "Classification").

Besides, patients undergoing endoscopy procedure may be offered [[sedation]] in order to avoid discomfort.
[[File:Laparoscopic stomach surgery.jpg|thumb|Laparoscopic surgery]]