Parallax is described by WhatIs.com with the following explanation: “The way an object’s position or direction seems to change depending on viewing angle. To experience this phenomena, simply cover one eye and focus on an object. Then move the cover to the other eye. Because each eye provides a different viewing angle, the object will appear to move.”

Machine Briefs:
Option #1: parallax= PA/RA/LAX
Option #2: parallax= PA/RA/LA*X
Option #3: parallax= PAR/RA/LA*X
Option #4: parallax= PAR/A/LAX
Option #5: parallax= PAR/A/LA*X
Option #6: parallax= PAR/LA*X