Fig. 2. (A) Frontal view of the left orbit. Shows the horizontal and vertical distances from point A to the STN and SON. (B) Front view of the right orbit. Shows the linear distances between each exit point and point A and B. A, medial angle of the orbit; B, lateral angle of the orbit; SON, supraorbital nerve; STN, supratrochlear nerve; HSON, horizontal distance between SONOUT and point A; HSTN, horizontal distance between STNOUT and point A; LASON, linear distance between SONOUT and point A; LASTN, linear distance between STNOUT and point A; LBSON, linear distance between SONOUT and point B; LBSTN, linear distance between STNOUT and point B; SONOUT, exit point of the supraorbital nerve; STNOUT, exit point of the supratrochlear nerve; VSON, vertical distance between SONOUT and point A; VSTN, horizontal distance between STNOUT and point A.
