Looking at the face is as important a diagnostic tool as listening to the pulse. When observing the face, there are three aspects that are noted. First is the physical structure - the size, shape, and placement of bone and cartilage.This corresponds to "man." Second is the glitter of the eyes and overall spiritual presence. This corresponds to "heaven." Third is the status of the physiological processes going on in the individual (corresponding to "earth").

Eyebrows divided into three areas

Most medial, superior to the inner canthus of the eye, corresponds to Kidney Outer third, medial to San Jiao 23, corresponds to San Jiao Middle third corresponds to Spleen