No clinically meaningful benefit from short-term use of blue-light filtering lenses

For the primary outcome measure of subjective visual fatigue, 3 trials reported no significant difference in symptoms with blue-light filtering lenses compared with non-blue-light filtering lenses. Further, 2 studies showed no clinically meaningful difference in critical flicker-fusion frequency (often used to quantify visual fatigue).

For the secondary outcome measures, the trial that assessed best-corrected visual acuity reported no significant difference between intervention arms. The 2 trials that evaluated daytime alertness using subjective symptom scores reported no significant difference between blue-light filtering and non-blue-light filtering lenses. For the sleep outcome, only 3 trials provided quantitative data and reported no significant difference in subjective sleep quality between intervention arms.

There were not enough data to determine possible harmful effects with certainty.