Final answer:
Cystoscopy is the procedure using an endoscope modified to view the bladder.
Step-by-step explanation:
The procedure using an endoscope modified to view the bladder is called cystoscopy. Cystoscopy is a medical procedure that involves inserting a thin, flexible tube with a light and camera on the end (endoscope) into the urethra to view the interior of the bladder. This procedure can be used to diagnose and treat various bladder conditions, such as urinary tract infections, bladder stones, and bladder cancer.