In conclusion, results showed a concurrent increase of both
visual fatigue and arousal under high screen luminance. While an
upsurge in visual fatigue – reflected by a reduction of the number
of eye blinks – might be a bad news for our eyes, the rise of arousal
– reflected by improved reading performance – has a quite good
connotation. For example, the fact that participants showed faster
reading times under high screen luminance without impairing
comprehension is definitely good news. A thought-provoking finding,
for which unfortunately we still do not have any explanation,
concerns the effect of the light source (either screen or ambient) on
arousal. Some of the measures employed in this experiment were
found to be sensitive to screen luminance (saccade velocity, microsaccade
rate, PD regression coefficient, reading speed) while other
to ambient illuminance (regressive saccade rate, reaction time):
future studies should examine the underlying reasons in depth.
Many recommendations can be found in the literature regarding
the optimal levels of ambient illuminance. In turn, the information
regarding screen luminance as well as the interaction between
luminance and illuminance is quite limited if not even missing.
The results of this study provide an initial perspective on such an
unexplored topic, which might have potential applications in
real-world settings such as schools, workplaces and homes. For
example, applications might involve the implementation of more
efficient automatic solutions for adjusting both screen luminance
and ambient illuminance, thus preventing visual fatigue, increasing
performance while optimizing power consumption.
In conclusion, results showed a concurrent increase of bothvisual fatigue and arousal under high screen luminance. While anupsurge in visual fatigue – reflected by a reduction of the numberof eye blinks – might be a bad news for our eyes, the rise of arousal– reflected by improved reading performance – has a quite goodconnotation. For example, the fact that participants showed fasterreading times under high screen luminance without impairingcomprehension is definitely good news. A thought-provoking finding,for which unfortunately we still do not have any explanation,concerns the effect of the light source (either screen or ambient) onarousal. Some of the measures employed in this experiment werefound to be sensitive to screen luminance (saccade velocity, microsaccaderate, PD regression coefficient, reading speed) while otherto ambient illuminance (regressive saccade rate, reaction time):future studies should examine the underlying reasons in depth.Many recommendations can be found in the literature regardingthe optimal levels of ambient illuminance. In turn, the informationregarding screen luminance as well as the interaction betweenluminance and illuminance is quite limited if not even missing.The results of this study provide an initial perspective on such anunexplored topic, which might have potential applications inreal-world settings such as schools, workplaces and homes. Forexample, applications might involve the implementation of more
efficient automatic solutions for adjusting both screen luminance
and ambient illuminance, thus preventing visual fatigue, increasing
performance while optimizing power consumption.
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