The appropriate position of the eyebrows is determined by evaluating the lateral 1/3rd arch peak which is observed over the lateral aspect of the brow. In females, the lateral 1/3rd peak should be positioned approximately 1cm above the superior orbital rim, the ridge of bone which is part of the eye socket and located above the eyeball; in contrast, in males, the lateral 1/3rd arch peak can be located at the superior orbital rim.