An arthroscope is a small, flexible tube equipped with a camera and light source, used by doctors to visualize the inside of a joint. It allows for minimally invasive procedures, meaning smaller incisions and less recovery time compared to traditional surgery. During an arthroscopy, the doctor inserts the arthroscope into the joint space, often in the knee, shoulder, or ankle, to diagnose and treat various conditions. This technique can help identify issues like tears, inflammation, or loose cartilage, enabling targeted treatment without extensive surgery.