Morning Blue Light Glasses May Improve Sleep and Next-Day Work Performance
A study found that wearing blue light-producing glasses for 30 minutes each morning improved sleep duration and quality. Better sleep was linked to greater alertness, engagement at work, and job performance the next day. Employees who already had sleep difficulties saw especially strong improvements in sleep quality.
The study builds on earlier work by Barnes and colleagues showing that evening blue-light-blocking eyewear improved sleep and next-day job outcomes. The new project, accepted by the Journal of Applied Psychology, tested the opposite approach: morning exposure. In a two-week field experiment, 182 full-time employees at a large Midwestern university wore light-emitting glasses for half an hour after waking on workdays.
The glasses direct blue-turquoise light toward the eyes and are meant for ordinary morning routines. A manufacturer donated 100 pairs, while the researchers bought another 100; no company funding supported the study. Circadian rhythms, roughly 24-hour internal cycles, respond strongly to light, and morning blue light may shift them earlier, making nighttime sleep easier.
If replicated, morning blue-light glasses could offer a low-burden option for workers seeking better sleep and daytime performance, especially those already struggling with sleep. Employers may see potential benefits in alertness and engagement, though access, cost, and individual differences could shape real-world effects. The findings may also encourage broader attention to light exposure and circadian health in office and remote-work routines.