Cystoscopy is endoscopy of the urinary bladder via the urethra. It is carried out with a cystoscope. The female urethra in vagina is the tube that carries urine from the bladder to the outside of the body. The cystoscope has lenses like a telescope or microscope. These lenses let the physician focus on the inner surfaces of the urinary tract. Some cystoscopes use optical fibres that carry an image from the tip of the instrument to a viewing piece at the other end.Cystoscope is introduced through vagina and urethra.