Anterior
Located on or near the front of organ
Posterior
Located on or near the back of the organ
Superior
Situated above, or directed upward
Inferior
Situated below, directed downward
Medial
Pertaining to the middle or the middle
Lateral
Pertaining to the side or a position further away from the middle
O.D.
Oculus dexter, right eye
O.S.
Oculus sinister, left eye
O.U.
Oculus uterque, both eyes