Flexible Cystoscopes. Flexible cystoscopes have small, soft, flexible shafts; a working channel; and an irrigation port. The optics consist of either fiberoptic bundles or, more recently, a distal sensor (either a complimentary metal oxide sensor or charge coupled device). Flexible cystoscopes have defective capabilities of up to 220 degrees, controlled by a thumb-operated lever. Unlike a rigid cystoscope, a flexible cystoscope is a single unit and does not come in multiple pieces. Flexible cystoscopes are more comfortable than rigid cystoscopes, and in some cases they can be deployed without anesthesia. In addition, the deflection capabilities improve visualization of the bladder mucosa and allow the cystoscope to be deployed with the patient supine.