In case you have ever wondered why doctors wore green or blue in the operating room, but never other colors? The reason could be that this seemingly insignificant practice can be a yardstick for the success of the surgery. As we all know that white is cleanliness. But the question remains that why doctors wear green or either blue color dress? It all started in the early twentieth century; when one influential doctor switched to green due to the fact that he believed it could be easier for the surgeon's eyes, based on an article in a 1998 issue of Today's Surgical Nurse. While it is difficult to confirm whether green scrubs have become popular because of this, green may be especially suited to helping doctors see better in the operating room because it is the opposite of red on a colored wheel. There are two major reasons why green could help doctors see well. The first reason is; seeing blue, or green can refresh a doctor's vision of red things, including a patient's bloody bowel during surgery. The brain interprets colors in relation to one another. If the surgeon looks at something red and pink, the surgeon becomes insensitive to it. The red signal in the brain fades, which can make it difficult to understand the nuances of the human body. Looking at something green at times can keep one's eyes more sensitive to red variations, says John Werner, a psychologist who studies vision at the University of California, Davis. The second reason is that such a deep focus on red, red and red can result in the distraction of green illusions on white surfaces. These glowing green ghosts could appear if a doctor shifts his gaze from reddish body tissue to something white; this is similar to a surgical drape or an anesthesiologist's alabaster outfit. A green illusion of the patient's red interior may appear on a white background. (You can try this "after effect" illusion yourself.) The uncomfortable image would follow the surgeon's view wherever it is, much like the floating spots we see after the camera flashes. It occurs because white light contains all the colors of the rainbow, including red and green. But the red path is always tired and the red/green path in the brain signals "green." However, if the doctor looks at green or blue scrubs instead of white, these disturbing spirits will mix and will not become a distraction, says Paola Bressan, who studies visual illusions at the University of Padova in Italy. So while doctors walk down the street today in a rainbow of long patterned and colored scrubs, green maybe the doctor's best choice.