For eye strain from screens, the best evidence says no.
A Cochrane review of 17 randomized trials found no meaningful benefit of blue-light filtering lenses for eye fatigue, visual performance, or sleep quality, and a double-masked trial of 120 computer users found blue-blocking lenses did not beat clear ones. What feels like "blue light damage" is usually plain eye strain: we blink less and hold one focus distance for hours at a screen. The fixes that actually work are free: the 20-20-20 rule, screen distance, brightness matched to the room, and artificial tears for dryness. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper .
What to do
Common questions
Do blue light glasses work?
For eye strain from screens, the best evidence says no: a Cochrane review of 17 trials found no meaningful difference between blue-light filtering lenses and ordinary lenses for eye fatigue, visual performance, or sleep quality. A double-masked randomized trial of 120 computer users found the same: blue-blocking lenses did not reduce eye strain signs or symptoms compared with clear lenses. The eye strain people blame on blue light is mostly about how we use screens: we blink less, focus at one distance for hours, and sit too close. What actually helps: the 20-20-20 rule (every 20 minutes, look at something 20 feet away for 20 seconds), screen distance and brightness adjustments, and artificial tears for dryness. Sleep claims rest on small, inconsistent studies. If you already own the glasses, they will not hurt you. But if you are shopping for relief, your habits around the screen will do more than the tint in the lens.