Green light may ease Post-Surgery pain and cut opioid use
NCT ID NCT07218289
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether bright green light can help reduce pain and the need for painkillers after surgery. Sixty adults having laparoscopic or robotic surgery will be randomly assigned to receive either bright green light or normal dim light in their hospital room. Researchers will measure pain levels, sleep quality, mood, and overall recovery to see if green light offers any benefits.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 60 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age \>/= 18 years * Planned to undergo laparoscopic or robotic surgery at UPMC Shadyside Hospital * Anticipated post-operative length of stay \>/= 48 hours * Able to speak and read English fluently, with the capacity to provide informed consent and complete the associated surveys independently Exclusion Criteria: * Pregnancy * History of significant ocular issues/dysfunction (†‡ ) (e.g., glaucoma, ocular trauma, macular degeneration, cataracts) that would interfere with the ocular mechanism of action * History of significant neurological disease (‡) (e.g., traumatic brain injury, stroke, neurodegenerative disease) that would compromise the reliability of pain screening and/or interfere with the central mechanism of action * History of bipolar disorder or schizophrenia, which could increase the risk of an adverse reaction to light exposure (i.e., acute mania) * History of splenectomy, which would interfere with the mechanism of action * Ocular issues corrected with contact lenses or spectacle corrective eyeglasses will NOT be considered a criterion for exclusion ‡Unclear cases will be at the discretion of the PI
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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UPMC Shadyside Hospital
RECRUITINGPittsburgh, Pennsylvania, 15232, United States
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