We always describe medical personnel as "white angels" because they always wear white coats. When it comes to the image of doctors, people immediately think of white coats.
However, before entering the operating room, doctors will take off their white coats and change into a set of blue or green surgical gowns, i.e. brush hand gowns.
Why not white, yellow and other colors? Is the reason for not wearing a white coat in the operating room simply because white clothes get dirty easily? Today, we will take you to explore the mystery behind the color of surgical gowns.
Before explaining this problem, we need to understand a concept called "complementary colors".
Once the human eye has watched a certain color for a long time, the visual nerve will receive stimulation leading to intermittent eye fatigue, in order to reduce this fatigue the visual nerve will induce a complementary color to self-regulate.
Therefore, if a surgeon uses blue and green surgical gowns, it will be easier for his eyes to distinguish the complementary color of blue and green - red, which is the color of human internal organs and blood - during surgery, and he will be able to do the surgery more accurately.
The human visual nerve is composed of red, yellow and blue color-sensitive cells. For example, when we stare at a red cloth with our eyes for a long time, the red-sensitive cells will go into a "dormant" state, and then quickly move our eyes to a white wall, we will feel that the white wall is full of green.
This visual phenomenon is called complementary color residual image, also known as afterimage visual effect. The principle of complementary residual image shows that the human eye always produces a complementary color as a toner in order to obtain its own balance.
A particular color always has only one complementary color, generally red with green, blue with orange, yellow with purple.