Bright Light as a Countermeasure for Circadian Desynchrony

Light is the primary means by which the internal circadian clock remains aligned ("entrained") with the external world. Misalignment of this internal clock can occur during situations such as shift work and jet travel across multiple time zones (jet lag). The purpose of this study is to examine the parameters of light and how they affect entrainment of the clock.

Stanford is currently accepting patients for this trial.

Lead Sponsor:

VA Palo Alto Health Care System

Collaborator: Palo Alto Veterans Institute for Research

Stanford Investigator(s):


  • Other: Bright light




Inclusion Criteria:

   - Good health

   - Normal hearing

Exclusion Criteria:

   - Sleep disorder

   - Extreme chronotype

   - Regular smoker

   - Depression

   - Alcohol abuse

   - Illegal drug use

Ages Eligible for Study

18 Years - 35 Years

Genders Eligible for Study


Now accepting new patients

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305