The aim of the present study was to investigate the conjoint
impact of luminance and illuminance on visual fatigue and arousal
during prolonged digital reading (one hour) using a multidimensional
approach based on eye, performance and subjective measures.
Results showed that some of these measures were
sensitive to luminance, others to illuminance, and others again to
specific combinations of luminance and illuminance levels. Two
groups of variables were selected according to their sensitivity
and reliability in detecting changes in visual fatigue and
arousal, and one variable aimed at verifying the nature and quality
of recall.