Could bright light fix Parkinson's sleep troubles?
NCT ID NCT02909192
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether bright light therapy can help with sleep and alertness issues in people with Parkinson's disease. Researchers will measure sleep quality, daytime sleepiness, and other non-motor symptoms in 65 participants. The goal is to see if light exposure can improve the body's internal clock and reduce these disabling symptoms.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Light therapy device
What this could lead to
If it works, this could offer a simple, drug-free way to improve sleep and daytime alertness for people with Parkinson's disease.
What could go wrong
This is a small, early-stage study with only 65 participants. The results may not apply to everyone, and bright light therapy might not work for all sleep problems in Parkinson's.
Disclaimer
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Massachusetts General Hospital
Boston, Massachusetts, 02114, United States