46 48 may be mounted at the same height on the chassis staggered along the x axis established by the display 12 the imagers 46 48 may be established by video camera and communicate with the processor 30 similarly imagers 50 52 may be associated with the second device 22 and may communicate with the processor 34 of the second device 22 fig2 shows logic that may be executed by the processor 30 34 commencing at block 54 the processor 30 of the first device 16 receives information from or both of the cameras 46 48 of the first device 16 representing eye tracking information of a viewer of the display 12 of the first device 16 at block 56 the processor determines a viewing angle u201c u03b8 u201d fig3 at which the viewer schematically shown at u201c v u201d in fig3 views the display 12 when more than a single viewer is imaged the most prominent viewer e g the one whose image is the largest may be used for determining the viewing angle u03b8 in one embodiment the viewing angle u03b8 may be the angle between the normal u201c n u201d between the viewer and the display and the line of sight u201c los u201d from the viewer 39 s eyes to the display 12 the viewing angle may be determined from an image of.