Optical fibers are not only used for light communication but it is used
in medicine for lighting difficult place of the human body, as for
example, internal organ of a man. As a result of application of optical
fiber gives clear image of disturbing point. For example doctor gets
possibility to check up wall of the stomach by placing wave-guide into
stomach. Light is sent through the one of the part of optical fiber for
brightness of the stomach and through the other part reflection of light
is got at another part of fiber.
The instrument based on optical fiber is used for this purpose is called
Endoscopes. It is very useful for checking up difficult place of human
body, when it needs for operation or fined wound place of patients
without any surgical disturbance.