Combinations of Bright Light, Scheduled Dark, Sunglasses, and Melatonin to Facilitate Circadian Entrainment to Night Shift Work

  title={Combinations of Bright Light, Scheduled Dark, Sunglasses, and Melatonin to Facilitate Circadian Entrainment to Night Shift Work},
  author={S. J. Crowley and Clara Lee and C. Y. Tseng and L. Fogg and C. Eastman},
  journal={Journal of Biological Rhythms},
  pages={513 - 523}
Various combinations of interventions were used to phase-delay circadian rhythms to correct their misalignment with night work and day sleep. Young participants (median age = 22, n= 67) participated in 5 consecutive simulated night shifts (2300 to 0700) and then slept at home (0830 to 1530) in darkened bedrooms. Participants wore sunglasses with normal or dark lenses (transmission 15% or 2%) when outside during the day. Participants took placebo or melatonin (1.8 mg sustained release) before… Expand
213 Citations
Shaping the light/dark pattern for circadian adaptation to night shift work
  • 52
Controlled Exposure to Light and Darkness Realigns the Salivary Cortisol Rhythm in Night Shift Workers
  • 53
  • Highly Influenced
Controlled Patterns of Daytime Light Exposure Improve Circadian Adjustment in Simulated Night Work
  • 25
  • Highly Influenced
Effects of Filtering Visual Short Wavelengths During Nocturnal Shiftwork on Sleep and Performance
  • 39
  • Highly Influenced
Practical Interventions to Promote Circadian Adaptation to Permanent Night Shift Work: Study 4
  • 76
  • PDF
The Impact of Sleep Timing and Bright Light Exposure on Attentional Impairment during Night Work
  • 82
  • Highly Influenced


Efficacy of bright light and sleep/darkness scheduling in alleviating circadian maladaptation to night work.
  • 131
  • PDF
High-intensity light for circadian adaptation to a 12-h shift of the sleep schedule.
  • C. Eastman
  • Psychology, Medicine
  • The American journal of physiology
  • 1992
  • 81
Conflicting Bright Light Exposure during Night Shifts Impedes Circadian Adaptation
  • 75
Circadian Adaptation to Night-Shift Work by Judicious Light and Darkness Exposure
  • 184
  • Highly Influential
Intermittent bright light and exercise to entrain human circadian rhythms to night work.
  • 116
  • PDF
Bright light, dark and melatonin can promote circadian adaptation in night shift workers.
  • 218
Profile of 24-h Light Exposure and Circadian Phase of Melatonin Secretion in Night Workers
  • 158