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Showing 1–14 of 14 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Darkness Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Objectively Diagnose and Monitor Treatment of Light Sensitivity

NCT03694626
View directory record Official record
Conditions
Photophobia, Traumatic Brain Injury, Migraine
Interventions
Pupillography, Ocular Coherence Tomography (OCT), Wrist-watch sensor device, Videography, Electrophysiology
Device
Lead sponsor
Randy Kardon
Other
Eligibility
18 Years to 80 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2028
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Nov 23, 2025 · Synced Sep 2, 2026, 10:50 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Dawn Simulation and Postural Hypotension

NCT02632318
View directory record Official record
Conditions
Orthostatic Hypotension
Interventions
Light
Device
Lead sponsor
VA Palo Alto Health Care System
Federal
Eligibility
55 Years to 85 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Oct 24, 2019 · Synced Sep 2, 2026, 10:50 PM EDT
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 2, 2026, 10:50 PM EDT
Completed No phase listed Observational

Improving the Assessment of Hypersomnolence

NCT02884505
View directory record Official record
Conditions
Disorders of Excessive Somnolence
Interventions
Pupillometry, Psychomotor Vigilance Task, Auditory Evoked Potential, Hypersomnia Severity Index
Device · Behavioral · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 89 Years
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 21, 2019 · Synced Sep 2, 2026, 10:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Influence of Nocturnal Light Exposure on the Impairment of Glucose Tolerance Induced by Chronic Sleep Restriction

NCT04868539
View directory record Official record
Conditions
Glucose Intolerance, Sleep Deprivation, Sleep
Interventions
Sleep Restriction with ALAN first, then Sleep Restriction without ALAN, Sleep Restriction without ALAN first, then sleep restriction with ALAN
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
20 Years to 40 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced Sep 2, 2026, 10:50 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Light-deprivation Utilized to Mitigate Amblyopia

NCT02685423
View directory record Official record
Conditions
Amblyopia
Interventions
Binocular deprivation 10 days, Vision training
Behavioral
Lead sponsor
State University of New York College of Optometry
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 28, 2019 · Synced Sep 2, 2026, 10:50 PM EDT
Recruiting Not applicable Interventional

DevRobust Treatment for Mal de Débarquement Syndrome

NCT05460520
View directory record Official record
Conditions
Mal de Débarquement Syndrome
Interventions
VOR Readaptation, VOR Habituation, Visual Motion Desensitization, Opposing visual motion stimulus
Behavioral
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 78 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 2, 2026, 10:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Human Circadian Sensitivity to Very Short Light Pulses

NCT01330992
View directory record Official record
Conditions
Circadian Rhythm Disorders
Interventions
Ocular light or darkness exposure
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 30 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 22, 2011 · Synced Sep 2, 2026, 10:50 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Can (Optical Coherence Tomography) Pictures of the Retina Detect Alzheimer's Disease at Its Earliest Stages?

NCT06023446
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment
Interventions
Optical Coherence Tomography
Diagnostic Test
Lead sponsor
University of California, Davis
Other
Eligibility
50 Years to 89 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Sep 2, 2026, 10:50 PM EDT
Completed Not applicable Interventional Results available

Treatments of Mal de Debarquement Syndrome (MdDS) by Habituation of Velocity Storage

NCT04213079
View directory record Official record
Conditions
Mal de Debarquement Syndrome (MdDS)
Interventions
re-adaptation of the vestibulo-ocular reflex, Habituation of velocity storage of the vestibulo-ocular reflex
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 78 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 2, 2024 · Synced Sep 2, 2026, 10:50 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Examining the Effects of Regular Brief Internet-based Meditation Practice on Mental Health and Well Being

NCT06014281
View directory record Official record
Conditions
Healthy, Well-Being, Psychological
Interventions
SOS Meditation
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated May 21, 2025 · Synced Sep 2, 2026, 10:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Light on the Choroid and Pupil

NCT05852782
View directory record Official record
Conditions
Emmetropia, Myopia
Interventions
White Light therapy, Blue light therapy, Red light therapy, Darkness
Other
Lead sponsor
University of Houston
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Sep 2, 2026, 10:50 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Floatation Experience in Nurses and Physicians

NCT05977894
View directory record Official record
Conditions
Burnout, Professional, Negative Affect, Positive Affect, Wellbeing, Burnout, Psychological
Interventions
Reduced Environmental Stimulation Therapy
Other
Lead sponsor
Mercy Health Ohio
Other
Eligibility
21 Years to 70 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Youngstown, Ohio
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Sep 2, 2026, 10:50 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Hippocampal Oscillations During Exploration

NCT07224191
View directory record Official record
Conditions
Epilepsy
Interventions
Visual Exploration, Ambulatory Exploration
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 70 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 2, 2026, 10:50 PM EDT