Key Takeaway
Wearing amber-tinted glasses that block blue light for 3 hours before bed significantly improved sleep quality and mood compared to yellow-tinted control glasses.
Summary
Early randomized trial examining whether blue-blocking amber glasses could improve sleep quality in adults with sleep complaints.
Methods
- Randomized crossover design
- 20 adults with sleep problems
- 3 weeks per condition
- Amber lenses (block blue) vs yellow lenses (control)
- Worn 3 hours before bedtime
- Sleep quality via Pittsburgh Sleep Quality Index
Key Results
- Significant improvement in sleep quality with amber lenses
- Improved mood scores
- Better subjective sleep experience
- Low-cost intervention
Limitations
- Small sample size
- Self-selected participants with sleep problems
- Subjective outcome measures
- Short intervention period