The former refers to the radian brow, eyebrow in the direction and continuity, but still eyebrow health; The latter refers to defect or depigmentation eyebrows, mostly because of chemical injury, thermal burns or skin diseases caused by limitations.

• 前者是指眉的弧度、眉毛的方向及连续性，但眉毛仍较健康；后者指眉毛缺损或脱失，多是因化学伤、热烧伤或局限性皮肤病所致。