What is “Golden Ratio Drawing” done before permanent makeup, and why can’t the same eyebrow shape be drawn on every face?

The golden ratio drawing is a method of determining the most suitable starting, arching, and ending points of eyebrows for an individual, based on the mathematical balance within the face itself (its 1.618 period). Using a special compass and threads, lines are drawn using the nostril, the inner corner of the eye, the outer boundary of the pupil, and the temporal bone as reference points. Because each person’s bone structure, eye distance, forehead width, and asymmetries are different, the golden ratio ruler will produce a completely different eyebrow shape for every face. An eyebrow shape that looks beautiful on someone else may create an artificial, surprised, or sad expression on the face if it is not adapted to your own bone anatomy.