Endoscopes

thumb|Drawing of an endoscope for Fetus|fetal detection, or "fetoscope" An endoscope is an inspection instrument composed of an image sensor, optical lens, a light source and a mechanical device, which is used to look deep into the body by openings such as the mouth or anus. A typical endoscope applies several modern technologies including optics, ergonomics, precision mechanics, electronics, and software engineering. With an endoscope, it is possible to observe lesions that cannot be detected by X-ray, making it useful in medical diagnosis. An endoscope uses tubes only a few millimeters thick

alt=Components of an otoscope|thumb|Components of an otoscope thumb|Anatomy of the human ear thumb|Right tympanic membrane as seen through a speculum thumb|A doctor performs an otoscopy examination. An otoscope or auriscope is a medical device used by healthcare professionals to examine the ear canal and eardrum. This may be done as part of routine physical examinations, or for evaluating specific ear complaints, such as earaches, sense of fullness in the ear, or hearing loss.

thumb|Schematic view of a rigid borescope thumb|Borescope in use, showing typical view through the device

thumb|240px|right|A low quality fiberscope observing the inside of an antique clock mechanism. Note how individual fibers are discernable, as each fiber only relays one part of the image.