The following is a special clinicosurgical essay that arose from the study of a routine aesthetic blepharoplasty in which the postoperative maintenance of an excess eyelid fold on one side was observed in spite of a greater tissue resection. The clinical investigation of a spectacular asymmetric eyebrow ptosis increased our interest in going through the pertinent literature to speculate any and all forms of change and concept that could lead us to the explanation for this picture of supraciliary abnormality. Because nothing has been reported to date in respect to the subject under study in this paper that would emphasizeeyebrow asymmetry, our research was intended to prove its occurrence on normal human face. It is our opinion that much data in the specialized literature is symptomatic, such as Eyebrow Ptosis, Asymmetric Upper Lids, Frontal FlacciditY and Blepharochalasis, and the well know Facial Asymmetry. All of this physiognomy of the human face is well know from a static structural point of view, however the subject that will be approached here is a sectorial asymmetry of an anatomo-functional nature.