A multimodal analysis of eye-movement and EEG responses during short-term blue-light filtering lens wear in a reading task

초록

Blue light filtering (BLF) lenses are widely marketed to enhance cognitive function during digital device use, yet objective evidence for their immediate effects remains limited. We investigated the immediate neurophysiological impact of short-term wear by comparing BLF lenses to non-filtering placebo lenses in a reading task. For a within-subjects experiment, 34 participants read texts for a total of 12 min while electroencephalogram and eye-tracking data were recorded for both lens conditions in a counter-balanced order. No significant difference in reading comprehension performance was found between the two conditions within this sample. Wearing the BLF lenses, however, induced significant physiological changes: eye-tracking revealed fewer, longer saccades and decreased fixation duration, while EEG showed decreased alpha and increased delta power. The present findings suggest that the physiological changes induced by BLF lenses did not result in any immediate behavioral or cognitive improvements.

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