In the operating room, if doctors, nurses and other staff wear white coats, due to the fact that doctors always see bright red bloodstains during the surgery, over time, occasionally shifting their gaze to their companions' white coats, they will see scattered "green bloodstains", causing visual confusion and affecting the surgical effect. Using light green fabric for surgical gowns not only eliminates the green illusion caused by visual makeup, but also reduces the fatigue of the doctor's optic nerve, ensuring smooth surgery.