Blue-Light Blocking Glasses for Sleep: What Trials Actually Show
Do blue-light blocking glasses improve sleep? Cochrane found very low-certainty evidence, while a healthy-adult trial found no objective benefit from evening lenses.
Blue Light, S-Cones, and the Real Limits of Sleep Glasses
Do blue-light glasses miss part of the circadian signal? Human studies put melanopsin first, but the S-cone question and real-world payoff remain unsettled.