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Showing 1–24 of 53 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Refraction Clear all
Not listed Not applicable Interventional

Study to Evaluate the Reliability, Validity and Safety of Subjective Mobile Refraction

NCT05049070
View directory record Official record
Conditions
Refractive Errors
Interventions
Mobile medical application to self administer a subjective refraction test, Standard of care refraction test
Diagnostic Test
Lead sponsor
1800 Contacts, Inc.
Industry
Eligibility
18 Years to 39 Years
Enrollment
349 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
12
States / cities
Beverly Hills, California • Petaluma, California • Pomona, California + 9 more
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

LFR-260 vs Traditional Phoropter in Visual Acuity Testing

NCT05259163
View directory record Official record
Conditions
Visual Acuity, Astigmatism, Anisometropia
Interventions
LFR-260 portable phoropter, Traditional phoropter (SOC)
Device
Lead sponsor
Evolution Optiks Limited
Industry
Eligibility
12 Years to 65 Years
Enrollment
112 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
Worcester, Massachusetts • Oyster Bay, New York
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Sep 2, 2026, 10:06 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Ocular Adaptation and Visual Performance for Accommodative Contact Lens

NCT02923232
View directory record Official record
Conditions
Functionality of Experimental Contact Lens
Interventions
Accommodative contact lens
Device
Lead sponsor
Pacific University
Other
Eligibility
40 Years to 65 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Forest Grove, Oregon
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Results available

Vivity IOL: Emmetropia Compared to Monovision.

NCT05464732
View directory record Official record
Conditions
Presbyopia
Interventions
Vivity IOL emmetropia, Vivity IOL monovision
Device
Lead sponsor
Carolina Eyecare Physicians, LLC
Other
Eligibility
50 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Mt. Pleasant, South Carolina
Source: ClinicalTrials.gov public record
Updated Mar 23, 2025 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Study of a Hand-held Device Plus Mobile App Versus Standard Eye Care Devices in Measuring Refractive Error of the Eye

NCT03929588
View directory record Official record
Conditions
Refractive Errors, Astigmatism
Interventions
Hand-held device supported by a mobile application, Phoropter, Autorefractor
Device
Lead sponsor
EyeQue Corp.
Industry
Eligibility
30 Years to 65 Years
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Inglewood, California
Source: ClinicalTrials.gov public record
Updated Mar 23, 2022 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigational Study of Accommodation Triggering and Control to Allow for the Performance of Refraction Measurements

NCT03957408
View directory record Official record
Conditions
Accommodation
Interventions
Visual Stimuli
Device
Lead sponsor
EyeQue Corp.
Industry
Eligibility
18 Years to 30 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Newark, California
Source: ClinicalTrials.gov public record
Updated Mar 23, 2021 · Synced Sep 2, 2026, 10:06 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Pediatric Refraction With SVOne Autorefractor

NCT02559271
View directory record Official record
Conditions
Ocular Refraction
Interventions
Not listed
Lead sponsor
Smart Vision Labs
Industry
Eligibility
5 Years to 16 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 23, 2015 · Synced Sep 2, 2026, 10:06 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Enhanced Housing Photoscreeners 2WIN and GoCheckKids Compared in Burma and Alaska

NCT04068129
View directory record Official record
Conditions
Amblyopia, Anisometropia
Interventions
photoscreen
Device
Lead sponsor
Alaska Blind Child Discovery
Other
Eligibility
6 Months to 40 Years
Enrollment
162 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Anchorage, Alaska
Source: ClinicalTrials.gov public record
Updated Oct 18, 2020 · Synced Sep 2, 2026, 10:06 AM EDT
Terminated Phase 1Phase 2 Interventional

Enhancement of Emmetropization in Hyperopic Infants

NCT00574717
View directory record Official record
Conditions
Hyperopia, Hypermetropia, Farsightedness
Interventions
Spectacles
Procedure
Lead sponsor
Ohio State University
Other
Eligibility
8 Weeks to 20 Weeks
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 18, 2012 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

At-home Testing Refraction Results With Best Corrected Visual Acuity (BCVA) Outcomes in Adults

NCT04820218
View directory record Official record
Conditions
Visual Impairment, Myopia, Hyperopia, Astigmatism
Interventions
With Try-on glasses
Device
Lead sponsor
EyeQue Corp.
Industry
Eligibility
30 Years and older
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Newark, California
Source: ClinicalTrials.gov public record
Updated Jan 24, 2023 · Synced Sep 2, 2026, 10:06 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Chromosome 18 Clinical Research Center

NCT00227253
View directory record Official record
Conditions
Chromosome Aberrations, Growth Hormone Deficiency, Hypomyelination
Interventions
Determination of growth hormone status, Measurement of growth, thyroid and sex hormone levels, Behavior and neuropsychometric evaluations, Audiological and ear, nose and throat examination, Magnetic resonance imaging of the brain, Dysmorphology evaluation, Neurology examination, Dental evaluation, Speech pathology evaluation, Psychiatric evaluation, Orthopedic evaluation, Ophthalmologic evaluation, Gastrointestinal evaluation
Procedure
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
Not listed
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1993 – 2040
U.S. locations
2
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 5, 2026 · Synced Sep 2, 2026, 10:06 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Clinical Investigation on Assessing the Repeatability and Reproducibility of Central and Peripheral Refractive Error

NCT06209476
View directory record Official record
Conditions
Refractive Error
Interventions
Experimental
Diagnostic Test
Lead sponsor
Johnson & Johnson Vision Care, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 24, 2025 · Synced Sep 2, 2026, 10:06 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

First-Sight Refractive Error Correction in the Developing World

NCT01598818
View directory record Official record
Conditions
Vision Loss
Interventions
Not listed
Lead sponsor
University of Nebraska
Other
Eligibility
7 Years to 50 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Results available

Spectacles for Patients With Down Syndrome

NCT03367793
View directory record Official record
Conditions
Vision, Low
Interventions
Spectacles - Clinically Derived, Spectacles - Metric Technique #1 Derived, Spectacles - Metric Technique #2 Derived
Device
Lead sponsor
University of Houston
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 24, 2021 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Results available

Safety and Effectiveness of the Calhoun Vision Light Adjustable Intraocular Lens (LAL)

NCT00845520
View directory record Official record
Conditions
Cataracts
Interventions
Lens implantation -1.00 D postop target, Lens implantation 0.00 D postop target
Device
Lead sponsor
Calhoun Vision, Inc.
Industry
Eligibility
40 Years to 80 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
5
States / cities
Los Altos, California • Los Angeles, California • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2018 · Synced Sep 2, 2026, 10:06 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Hyperopia Correction Using the NTK Optimal Keratoplasty (Opti-K) System

NCT01028937
View directory record Official record
Conditions
Hyperopia
Interventions
Optimal Keratoplasty
Device
Lead sponsor
NTK Enterprises, Inc.
Industry
Eligibility
40 Years and older
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 8, 2019 · Synced Sep 2, 2026, 10:06 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Comparison of Contoura Vision Outcomes Programmed Using the Manifest Refraction Verses Using Phorcides Planning Software in Patients With Oblique Astigmatism

NCT05888337
View directory record Official record
Conditions
Myopia, Astigmatism
Interventions
Contoura LASIK with Phorcides planning strategy, Contoura LASIK with manifest refraction planning strategy
Device
Lead sponsor
Bismarck Lasik
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Bismarck, North Dakota
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Sep 2, 2026, 10:06 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Refitting Satisfied INFUSE One-Day Multifocal Wearers to DAILIES TOTAL1 Multifocal Contact Lenses

NCT07638943
View directory record Official record
Conditions
Contact Lens Comfort and Successful Refitting, Presbyopia
Interventions
DAILIES TOTAL1 Multifocal (delefilcon A)
Device
Lead sponsor
Gordon Schanzlin New Vision
Other
Eligibility
40 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Sep 2, 2026, 10:06 AM EDT
Active, not recruiting Not applicable Interventional

Acuity 200™ (Fluoroxyfocon A) Orthokeratology Contact Lens for Overnight Wear

NCT06009458
View directory record Official record
Conditions
Myopia
Interventions
Acuity 200™ (fluoroxyfocon A) Orthokeratology Contact Lens for Overnight Wear
Device
Lead sponsor
Acuity Polymers, Inc.
Industry
Eligibility
7 Years and older
Enrollment
387 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
9
States / cities
Mission Viejo, California • Oakland, California • San Francisco, California + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Results available

Symfony Toric Intraocular Lens Visual Outcomes

NCT03082599
View directory record Official record
Conditions
Cataract Bilateral, Astigmatism Bilateral
Interventions
Presbyopia and astigmatism correcting intraocular lens
Device
Lead sponsor
Carolina Eyecare Physicians, LLC
Other
Eligibility
40 Years to 99 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
4
States / cities
Stillwater, Minnesota • Garden City, New York • Mt. Pleasant, South Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional

Influence of DisCoVisc Ophthalmic Viscosurgical Device (OVD) on Intraoperative Aberrometry Readings

NCT03751033
View directory record Official record
Conditions
Cataract
Interventions
BSS, DiscoVisc
Device
Lead sponsor
Clinical Research Consultants, Inc.
Industry
Eligibility
22 Years to 95 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
3
States / cities
Los Angeles, California • Brecksville, Ohio • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 20, 2020 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional Results available

Trial of Overminus Spectacle Therapy for Intermittent Exotropia

NCT02807350
View directory record Official record
Conditions
Intermittent Exotropia
Interventions
Overminus treatment, Non-overminus treatment
Device
Lead sponsor
Jaeb Center for Health Research
Other
Eligibility
3 Years to 10 Years
Enrollment
386 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
59
States / cities
Birmingham, Alabama • Glendale, Arizona • Little Rock, Arkansas + 50 more
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Not applicable Interventional

A Prospective Clinical Study to Evaluate the Repeatability of the Visibly Vision Test

NCT06812572
View directory record Official record
Conditions
Myopia, Astigmatism
Interventions
Visibly Vision Test
Device
Lead sponsor
Visibly
Industry
Eligibility
22 Years to 55 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Harlingen, Texas
Source: ClinicalTrials.gov public record
Updated Feb 5, 2025 · Synced Sep 2, 2026, 10:06 AM EDT
Completed Phase 2 Interventional Results available

Dilated Versus Non-Dilated Wavefront Corrections for Patients With Down Syndrome

NCT05059041
View directory record Official record
Conditions
Down Syndrome, Refractive Errors
Interventions
Dilated Refraction, Non-Dilated Refraction
Device
Lead sponsor
Ohio State University
Other
Eligibility
5 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
2
States / cities
Columbus, Ohio • Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 2, 2026, 10:06 AM EDT