The common terms are endoscopy or sigmoidoscopy or endoscope.
An instrument used to view the rectum that features a cutting and burning loop is called a "rectoscope" or "rectal resectoscope." This device allows for direct visualization of the rectal area and can be used for surgical procedures, such as removing polyps or lesions, through electrocautery. The loop can cut tissue and simultaneously cauterize to minimize bleeding.
Colonoscopy is an endoscopic medical procedure that uses a long, flexible, lighted tubular instrument called a colonoscope to view the rectum and the entire inner lining of the colon (large intestine).
instrument used to view the eye
A microscope.
To view things from far away is called a binocular
Retinascope
our naked eyes...
Yes. A colonoscopy views the entire colon. It passes from the anus to the rectum, sigmoid colon, descending colon, transverse colon, ascending colon and on occasion may look at the distal part of the small bowel as well.
periscope
The medical term for an instrument used to view small objects is "microscope." It is commonly used in various medical fields for examining cells, tissues, or microorganisms at a magnified level.
An optical telescope is the simplest instrument to view the heavens.
There are many. The general term would be optical instruments