The incision above the eyebrow arch is vertical. Longitudinal incision is used in eyebrow bone plastic surgery, which can better hide the surgical scar and change the shape of eyebrow bone. Lateral surgery is used for forehead plastic surgery. Through this incision, the operating area can be better exposed for forehead bone reconstruction and other operations. So the incision above the eyebrow arch is vertical. Eyebrow arch refers to a bone located under the orbit in the human facial skeleton structure, also known as eyebrow bone or eyebrow arch process. It is located above the orbit and below the frontal bone, forming the lower contour of the eyebrows on the facial contour. Eyebrow arch is symmetrical on both sides.