Evening Blue‑Light Blocking Glasses: Randomized Crossover Trial
Summary
Two‑week randomized crossover comparing blue‑blocking vs control lenses on sleep outcomes in healthy adults.
Why It Matters For Night Shift Workers and Night Owls
Alternating conditions in this trial how timing and spectrum of light on shift versus before daytime sleep found sleep & alertness for night‑shift workers and night owls. Together with other trials, it frames light as a measurable lever for on‑shift alertness and next‑day sleep, not just ambience. For people who work nights, that frames an everyday choice (when you eat, how you light the end of a shift, how rest is split) as part of the mechanism, not just routine.
Notes
Population: healthy adults (not shift workers).