Abstract
Two experiments were carried out to seek the angle at which subjects prefer to look at a VDT screen. The first experiment seeked to determine the preferred declination of the line of sight below the Frankfurt Plane. The main finding was taht subjects sitting with their heads upright preferred an average declination of -10 deg below FP. The second experiment was to find the effects of backrest angle on the preferred viewing angle. The main finding was the overall angle of declination below the horizon when sitting upright (90 deg) was -19 deg, and was -16 deg when sitting reclined (105 deg).
