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Can green light glasses take the sting out of surgery?

NCT ID NCT07033949

Symptom relief Sponsor: The Second Affiliated Hospital of Chongqing Medical University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 17, 2026 · Last updated Sep 18, 2026 · Updated 1 time

Summary

Researchers are testing whether wearing green light glasses can lower pain during a common hospital procedure and surgery. The study includes healthy volunteers and patients having abdominal surgery. Some participants get real green light, while others get identical glasses that are turned off. The team measures pain intensity and sensitivity to see if green light makes a difference.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
green light exposure through special glasses
What this could lead to
If green light reduces pain, it could offer a drug-free way to ease discomfort during procedures and surgery.
What could go wrong
This is an early study with 140 people, so results may not hold up in larger groups. Green light may not work better than a sham device, and it only targets specific types of pain.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

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

140 people

The number who actually took part.

Started

Jul 2025

Finished

Apr 2026

Lead sponsor

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

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria Healthy volunteers: 1. Age 18-65 years. 2. ASA physical status I. 1\. Age 18-65 years. 2. ASA physical status I-III. 3. Scheduled for elective abdominal surgery under general anesthesia requiring arterial puncture. Exclusion Criteria： 1. Skin ulceration, dermatitis, or allergic reactions at the study site. 2. Chronic use of analgesics or psychiatric medications. 3. Color blindness or uncorrected cataracts. 4. Severe cardiovascular, respiratory, or inflammatory diseases. 5. Failure of the initial arterial puncture attempt (surgical cohort only). 6. Inability to communicate or provide informed consent.

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Conditions

The condition(s) this trial relates to.

Acute Pain Pain

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Pain

Contacts and locations

Locations

  • The Second Affiliated Hospital of Chongqing Medical University

    Chongqing, Chongqing Municipality, 4000000, China

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