Eye movements, performance and visual comfort using VDTs

Two experiments are reported in which the mean luminance and the luminance contrast of pseudo texts displayed on a VDT were varied. The subjects carried out a lettersearch task and rated the visual comfort of the texts . The eye movements of the subjects were also recorded. The results show a good correspondence between visual comfort, which is a subjective attribute, and object ive parameters related to eye movements and performance. It may be found that the scaling of visual comfort is not only an economical but also a valid way to evaluate VDT displays.