1. A narrow tubular instrument that is passed through the urethra to examine the interior of the urethra and the urinary bladder.
2.The cystoscope has lenses similar to a telescope or a microscope.

These lenses make it possible for the doctor to focus on the inner surfaces of the urinary tract.

Some cystoscopes use optical fibers (flexible glass fibers) that carry an image from the tip of the instrument to a viewing piece at the other end.

The cystoscope is as thin as a pencil and has a light at the tip and many cystoscopes have extra tubes to guide other instruments for procedures to treat urinary problems.