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ClinicalTrials.gov public records Last synced Oct 5, 2026, 7:22 PM EDT

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Showing 1–24 of 46 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Pupil Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Sex and Age on Non-visual Light Input That Affects Sleep and Circadian Rhythms

NCT05829044
View directory record Official record
Conditions
Normal Physiology
Interventions
Pupillometry, Light box exposure
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 5, 2026, 7:22 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Relationships Among Pupil Responses to Light, Circadian Rhythms, and Sleep

NCT07753889
View directory record Official record
Conditions
Circadian Rhythm, Pupillometry, Sleep
Interventions
Ocular light exposure from portable light box
Other
Lead sponsor
Elizabeth B Klerman MD PhD
Other
Eligibility
18 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2027 – 2035
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Brimonidine on Intraocular Pressure When Dilating Routine Patients

NCT03139708
View directory record Official record
Conditions
Intraocular Pressure
Interventions
Alphagan, Phenylephrine, Tropicamide
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 50 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 9, 2018 · Synced Oct 5, 2026, 7:22 PM EDT
Completed No phase listed Observational

Outcome pRognostication of Acute Brain Injury With the NeuroloGical Pupil indEx

NCT04490005
View directory record Official record
Conditions
Acute Brain Injury, Pupillary Reflex Impaired
Interventions
pupillometry
Other
Lead sponsor
University of Milano Bicocca
Other
Eligibility
18 Years and older
Enrollment
118 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
4
States / cities
San Francisco, California • Baltimore, Maryland • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 25, 2023 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

"Eye Protection After Mydriatic Use for ROP Screening: Impact on Vitals Signs and Pain Scores"

NCT01860534
View directory record Official record
Conditions
Light Sensitivity
Interventions
eye covers
Behavioral
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
Not listed
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 14, 2016 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Results available

A Randomized Study in Children Ages Birth Through Three Years Undergoing Unilateral Cataract Extraction With or Without Lens Replacement

NCT02132312
View directory record Official record
Conditions
Unilateral Cataract Extraction, Congenital Cataract
Interventions
OMS302, Phenylephrine HCl
Drug
Lead sponsor
Omeros Corporation
Industry
Eligibility
1 Day to 47 Months
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
11
States / cities
Los Angeles, California • Atlanta, Georgia • Chicago, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2021 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Side Effects of Atropine (SEA) Study

NCT03593044
View directory record Official record
Conditions
Myopia
Interventions
0.01% concentration atropine drops
Drug
Lead sponsor
Jeffrey J. Walline, OD PhD
Other
Eligibility
21 Years to 30 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 2, 2022 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Efficacy of Nyxol (0.75% Phentolamine Ophthalmic Solution) to Reverse Pharmacologically-Induced Mydriasis (MIRA-3)

NCT05134974
View directory record Official record
Conditions
Mydriasis, Dilation
Interventions
Phentolamine Ophthalmic Solution 0.75%, Phentolamine Ophthalmic Solution Vehicle
Drug
Lead sponsor
Ocuphire Pharma, Inc.
Industry
Eligibility
12 Years and older
Enrollment
368 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
15
States / cities
Newport Beach, California • Westminster, California • Delray Beach, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Aug 29, 2023 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

tVNS Responsiveness Testing With Pupil Size

NCT06335199
View directory record Official record
Conditions
Stroke, Healthy Adult
Interventions
Unilateral Left tVNS stimulation, Bilateral tVNS stimulation, Unilateral Left Sham stimulation, Bilateral Sham stimulation, Unilateral Right tVNS stimulation, Unilateral Right Sham stimulation
Procedure
Lead sponsor
Georgia Institute of Technology
Other
Eligibility
18 Years to 89 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Intramuscular (IM) Oxytocin on Pupil Diameter and Heart Rate Variability (HRV)

NCT04105998
View directory record Official record
Conditions
Chronic Pain Due to Injury
Interventions
Oxytocin, Placebo
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 66 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 10, 2022 · Synced Oct 5, 2026, 7:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Flashing Light-Induced Pupil Response (FLIPR) Glaucoma Study

NCT01857440
View directory record Official record
Conditions
Glaucoma, Open-Angle, Eye Diseases
Interventions
Not listed
Lead sponsor
Ohio State University
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
2
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 25, 2017 · Synced Oct 5, 2026, 7:22 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal Measurements of Visual Diet in Children

NCT07642999
View directory record Official record
Conditions
Myopia, Visual Diet, Pupil, Viewing Distance, Illuminance, Wavelength, Vergence, Accommodative Facility
Interventions
Not listed
Lead sponsor
State University of New York College of Optometry
Other
Eligibility
7 Years to 12 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 5, 2026, 7:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Head Injury-associated Photosensitivity and Pupillary Function (HIPP) Study

NCT01942564
View directory record Official record
Conditions
Head Injury, Traumatic Brain Injury (TBI), Photosensitivity, Photophobia
Interventions
Not listed
Lead sponsor
Ohio State University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 25, 2017 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Efficacy of Nyxol (0.75% Phentolamine Ophthalmic Solution) to Reverse Pharmacologically-Induced Mydriasis

NCT04620213
View directory record Official record
Conditions
Mydriasis, Dilation
Interventions
Phentolamine Ophthalmic Solution 0.75%, Phentolamine Ophthalmic Solution Vehicle (Placebo)
Drug · Other
Lead sponsor
Ocuphire Pharma, Inc.
Industry
Eligibility
12 Years and older
Enrollment
185 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
12
States / cities
Newport Beach, California • San Diego, California • Longwood, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2023 · Synced Oct 5, 2026, 7:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cause of Pigment Dispersion Syndrome

NCT00005919
View directory record Official record
Conditions
Glaucoma, Healthy, Pigment Dispersion Syndrome
Interventions
Not listed
Lead sponsor
National Eye Institute (NEI)
NIH
Eligibility
Not listed
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 5, 2026, 7:22 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Pupil-Indexed Noninvasive Neuromodulation

NCT06282406
View directory record Official record
Conditions
Paresis
Interventions
Transcutaneous Electrical Stimulation, Sham
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 75 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 24, 2026 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Study of the Safety, Efficacy and PK of EYN-1601 in Dilation of the Pupil

NCT02946125
View directory record Official record
Conditions
Mydriasis
Interventions
MDD-administered EYN-1601, Phenylephrine 2.5% Eyedrop, Phenylephrine 10% Eyedrop
Combination Product · Drug
Lead sponsor
Eyenovia Inc.
Industry
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Artesia, California
Source: ClinicalTrials.gov public record
Updated Jul 27, 2022 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 2 Interventional Results available

Pupil Dilation for Treatment of IFIS

NCT03760185
View directory record Official record
Conditions
Intraoperative Floppy Iris Syndrome
Interventions
Brimonidine Tartrate
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
18 Years to 100 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 20, 2022 · Synced Oct 5, 2026, 7:22 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 10, 2023 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Early Phase 1 Interventional

Evaluation of NV701 (Pilocarpine 1.25%) Compared With Vuity (Pilocarpine 1.25%) on Pupil Size in Subjects With Presbyopia

NCT06783686
View directory record Official record
Conditions
Pupil Constriction
Interventions
NV701, Pilocarpine 1.25% Eye drop
Drug
Lead sponsor
Novus Vision LLC
Industry
Eligibility
40 Years to 55 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
2
States / cities
Chandler, Arizona • Glendale, California
Source: ClinicalTrials.gov public record
Updated Sep 5, 2025 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Efficacy of Phenylephrine 2.5%-Tropicamide 1% Microdose Ophthalmic Solution for Pupil Dilation

NCT03751098
View directory record Official record
Conditions
Mydriasis
Interventions
Tropicamide/Phenylephrine ophthalmic solution (TR/PE), Placebo
Drug
Lead sponsor
Eyenovia Inc.
Industry
Eligibility
Not listed
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
2
States / cities
Austin, Texas • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Mar 18, 2022 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Results available

Safety, Efficacy and Pharmacokinetics of OMS302 in Subjects Undergoing Intraocular Lens Replacement With Phacoemulsification

NCT01579565
View directory record Official record
Conditions
Intraocular Lens Replacement
Interventions
OMS302, Placebo
Drug
Lead sponsor
Omeros Corporation
Industry
Eligibility
18 Years and older
Enrollment
416 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
13
States / cities
Chandler, Arizona • Los Angeles, California • Fort Myers, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Oct 5, 2026, 7:22 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Exploration of Pupil Dilation in Horner's Patients Taking Flomax

NCT03615508
View directory record Official record
Conditions
Horner Syndrome
Interventions
10% phenylephrine
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
2
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 3, 2022 · Synced Oct 5, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of OMS302 in Subjects Undergoing Intraocular Lens Replacement With Phacoemulsification

NCT01454063
View directory record Official record
Conditions
Intraocular Lens Replacement
Interventions
OMS302, Placebo
Drug
Lead sponsor
Omeros Corporation
Industry
Eligibility
18 Years and older
Enrollment
405 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
16
States / cities
Chandler, Arizona • Glendale, Arizona • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2014 · Synced Oct 5, 2026, 7:22 PM EDT