He figures he's done about 6,000 illustrations in his 20-year career.
Most artists gather up paints, brushes and canvas, then head outdoors to paint.
Michael Leonard dons surgical scrubs and carries his pencils and paper into the operating room, taking up his position next to the surgeon. Leonard is a renowned surgical and medical illustrator. Instead of landscapes or still lifes, his subjects include the heart, the eye and the hand. His incredibly detailed drawings are realistic and anatomically correct. Leonard acts as the surgeon's eye, sketching details of a procedure as the physician works.