Clinical Trial: Human Circadian Sensitivity to Very Short Light Pulses

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: Human Circadian Sensitivity to Very Short Light Pulses

Brief Summary: The mammalian eye serves both visual and non-image-forming functions. New information about the non-image-forming anatomy and physiology of the eye has revealed effects of ocular light stimuli on human circadian rhythms, melatonin suppression, heart rate, pupillary reflexes, cognitive performance, alertness and sleep. The results of the proposed work can be used to make predictions about the effects of light, to make recommendations involving exposure to or avoidance of light, and to design environmental lighting, resulting in improved health and alertness and decreased errors and accidents.

Detailed Summary:
Sponsor: Brigham and Women's Hospital

Current Primary Outcome: Circadian Phase (hours) [ Time Frame: Before and after intervention (day 1) ]

Circadian phase (hours) measured before and after intervention


Original Primary Outcome: Same as current

Current Secondary Outcome:

Original Secondary Outcome:

Information By: Brigham and Women's Hospital

Dates:
Date Received: April 1, 2011
Date Started: December 2009
Date Completion:
Last Updated: August 19, 2011
Last Verified: August 2011