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Showing 1–16 of 16 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Dim-light control condition Clear all
Recruiting No phase listed Observational Accepts healthy volunteers

Medications for Opioid Use Disorder Photosensitive Retinal Ganglion Cell Function, Sleep, and Circadian Rhythms: Implications for Treatment

NCT06104280
View directory record Official record
Conditions
Opioid Use Disorder, Sleep Disturbance
Interventions
Post-Illumination Pupillary Response (PIPR), Polysomnography, Multiple Sleep Latency Test, Ecological Momentary Assessments, Actigraphy, DLMO, Melatonin Suppression Test
Other · Behavioral · Device
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 80 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 7, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Nighttime Synchrony of Your Nutrition and Circadian Health

NCT07329283
View directory record Official record
Conditions
Sleep, Metabolism Changes, Circadian Rhythm, Lifestyle Factors, Sleep Hygiene, Sleep Hygiene, Inadequate, Sleep Deprivation, Insufficient Sleep, Circadian Misalignment, Circadian Dysregulation, Light Exposure
Interventions
Central Clock Misalignment, Peripheral Misalignment
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 35 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2031
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Phase 3 Interventional Results available

Light Therapy for Bipolar Disorder. Efficacy of Light Therapy for Bipolar Depression: A Randomized Controlled Trial

NCT00852592
View directory record Official record
Conditions
Bipolar Disorder, Major Depressive Episode
Interventions
7000lux broad-spectrum light, 50lux dim red light
Device
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 65 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 6, 2016 · Synced Sep 7, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

SCREENS: Sleep, Circadian Rhythms, and Electronics in the EveNing Study

NCT06192745
View directory record Official record
Conditions
Sleep, Circadian Rhythm, Executive Function, Emotion Regulation
Interventions
no screen control with dim light and calming activities, unfiltered Bright tablet screen, Filtered dim tablet screen, Exciting content, Calming Content
Behavioral
Lead sponsor
Baylor College of Medicine
Other
Eligibility
8 Years to 11 Years
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Results available

Smart Lighting for Nursing Home Residents With Dementia

NCT05825404
View directory record Official record
Conditions
Alzheimer's Disease and Related Dementias
Interventions
Smart Ambient Bright Light (SABL), Control
Device · Other
Lead sponsor
Penn State University
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
2
States / cities
Belleville, Pennsylvania • DuBois, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 7, 2025 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Individually Tailored Lighting System to Improve Sleep in Older Adults

NCT01855126
View directory record Official record
Conditions
Sleep Disturbances
Interventions
Blue light, Red light
Other
Lead sponsor
Rensselaer Polytechnic Institute
Other
Eligibility
65 Years and older
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Troy, New York
Source: ClinicalTrials.gov public record
Updated Jan 28, 2019 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Light Treatment for Sleep/Wake Disturbances in Alzheimer's Disease

NCT00946530
View directory record Official record
Conditions
Sleep Initiation and Maintenance Disorders
Interventions
Bright light, Control
Device
Lead sponsor
Stanford University
Other
Eligibility
55 Years to 100 Years
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2010
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced Sep 7, 2026, 10:23 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Light Heart Study: Daily Light Box Use for Depressive Symptoms in Patients With Stage B Heart Failure

NCT02691000
View directory record Official record
Conditions
Depression, Stage B Heart Failure
Interventions
LiteBook
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
60 Years and older
Enrollment
122 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 7, 2026, 10:23 PM EDT
Enrolling by invitation Phase 2 Interventional

Bright Light Therapy for Depressed Geriatric Inpatients

NCT07002554
View directory record Official record
Conditions
Unipolar Depression
Interventions
Bright light therapy, dim red light
Device
Lead sponsor
Medical University of South Carolina
Other
Eligibility
60 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Sep 7, 2026, 10:23 PM EDT
Recruiting Phase 2 Interventional

Correcting Circadian Rhythms to Breakthrough in Bipolar Disorder

NCT06226025
View directory record Official record
Conditions
Bipolar Disorder, Delayed Sleep-Wake Phase Disorder
Interventions
Melatonin, Placebo, Behavioral sleep intervention, Behavioral sleep control
Drug · Other · Behavioral
Lead sponsor
Leslie Swanson
Other
Eligibility
18 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Understanding Circadian Responses to Light in Persons With Mild Cognitive Impairment

NCT05411822
View directory record Official record
Conditions
Mild Cognitive Impairment, Alzheimer Disease
Interventions
Lighting Intervention Blue light, Lighting Intervention Green light, Dim-light control condition
Device · Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
55 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Menands, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2025 · Synced Sep 7, 2026, 10:23 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Glaucoma, Visual Field Loss, and Their Association With Life Space in Older Adults

NCT04396002
View directory record Official record
Conditions
Primary Open Angle Glaucoma
Interventions
Life Space Questionnaire, Low Luminance Questionnaire, Contrast sensitivity under dim illumination, Visual field under dim illumination (MAIA), Macular Pigment Optical Density (MPOD), Dark Adaptation
Diagnostic Test
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 100 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Filtered Eyewear to Prevent Light-induced Melatonin Suppression - Aim 1

NCT06310135
View directory record Official record
Conditions
Sleep Quality
Interventions
Filtered Eyewear, Unfiltered Eyewear, No Filters
Device · Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Menands, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2025 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Bright Light on Co-occurring Cancer-related Symptoms in Breast Cancer Survivors

NCT03304587
View directory record Official record
Conditions
Breast Cancer
Interventions
Polysomnography (PSG), Rectal thermistor 400 Series, Bright blue-green light, Dim red light, Digital foot candle datalogging light meter, Patient-Reported Outcomes Measurement Information System (PROMIS)-Cancer-Fatigue, Patient-Reported Outcomes Measurement Information System (PROMIS)-Sleep Disturbance, Patient-Reported Outcomes Measurement Information System (PROMIS)-Depression, Patient-Reported Outcomes Measurement Information System (PROMIS)-Physical Function, Pittsburgh Sleep Quality Index (PSQI), Center for Epidemiological Studies - Depression, Montreal Cognitive Assessment (MoCA), European Organization for Research and Treatment of Cancer-Quality of Life Questionnaire (EORTC QLQ-C30), Daily Log
Diagnostic Test · Other
Lead sponsor
Michigan State University
Other
Eligibility
21 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
East Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Sep 7, 2026, 10:23 PM EDT
Enrolling by invitation Phase 1Phase 2 Interventional

Evaluation of Lymphatic Response to Physiotherapy in Patients With Swelling Associated With Superficial Venous Disease

NCT07165340
View directory record Official record
Conditions
Chronic Venous Disease
Interventions
Indocyanine Green near infrared fluorescence imaging, advanced pneumatic compression, Duplex ultrasound, compression wrap
Combination Product · Device · Diagnostic Test
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced Sep 7, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Goodnight Screen Media Study

NCT05820555
View directory record Official record
Conditions
Sleep, Sleep Hygiene
Interventions
Timed evening technology and digital media use (tablet use), no technology and digital media use (screen media use)
Behavioral
Lead sponsor
Baylor College of Medicine
Other
Eligibility
48 Months to 59 Months
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Sep 7, 2026, 10:23 PM EDT