Anterior
Located on or near the front of an organ
Posterior
Located on or near the back of an organ
Superior
Situated above or directed upward
Inferior
(Such as Inferior Rectus)
Situated below or directed downward
Medial
Pertaining to the middle or the midline
Lateral
Pertaining to the side or a position farther away from the midline
O.D.
Latin abbreviation for oculus dexter, which means right eye
O.S.
Latin abbreviation for oculus sinister, which means left eye
O.U.
Latin abbreviation for oculus uterque, which means both eyes.