When the white robe doctor and the white angel enter the operating room, they must all be replaced with green surgical gowns. The original green color is the complementary color of red. When the doctor opens the knife, he must concentrate on the red blood. After a long time, the brain will be tired and the red will be blurred. ,
Transferring the line of sight to a complementary green surgical gown can help the doctor to relieve visual fatigue and keep the brain sensitive to red in order to operate the scalpel accurately.