The supraorbital nerve passes through the supraorbital foramen, and gives off, in this situation, palpebral filaments to the upper eyelid. Additionally it supplies the conjunctiva of the eye, the frontal sinus and the skin from the forehead extending back to the middle of the scalp.

The supraorbital nerve frequently constitutes the lateral landmark of the frontal sinus, consequently keeping lateral to it, avoids entering the sinus cavity. However there are several variants that have to be considered.