Excerpted from Kleiner's Corner April 2006
“BLUE LIGHT CAN RESET YOUR BIOLOGICAL RYTHYM
“Your eyes do more than see. Researchers at Harvard Medical School demonstrated this by showing that your eyes
are part of a light reception system that can keep you alert when sleep starts to fog your brain. When the
researchers exposed people to blue light at night, this system immediately increased their alertness and
performance on tests. ‘These findings add to a growing body of evidence that a novel light reception system
exists in the human eye in addition to sight’ says Steven Lockley, an assistant professor at Harvard Medical
School and a researcher in sleep medicine at Brigham and Women's Hospital in Boston. ‘Men and women exposed
to blue light sustained a high level of alertness during the night when people feel most sleepy. These results
suggest that light may be a powerful countermeasure for the negative effects of fatigue for people who work or
study at night,’" quoting Harvard News.
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