Clinical trials: Error, Refractive
Myopia
The Incidence and Progression of Myopia: Cohort Study
A cohort study on incidence and progression of myopia in a group of medical students
- Trial name
- NCT03244670
- Testing
- Observation study only, no specific intervention
- Where
- China
- Volunteers
- 350 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Myopia, Cost-effectiveness Analysis
Comparing Myopia Treatments in Youth: Defocus Spectacles, Glasses, and Ortho-K
The research project titled "A Comparative Study on the Clinical Efficacy, Quality of Life, and Cost of Use of Peripheral Defocus Spectacles, Frame Glasses, and Orthokeratology Lenses in Myopic Children and Adolescents" aims to…
- Conditions
- Myopia, Cost-effectiveness Analysis, Quality of Life
- Trial name
- NCT06278974
- Where
- China
- Volunteers
- 90 people
- Sponsor
- He Eye Hospital
Ametropia
Three-month Clinical Evaluation of Silicone Hydrogel Definitive 65 Contact Lenses
Comparison of different contact lens materials.
- Trial name
- NCT02249689
- Testing
- Definitive 65, Definitive 74
- Where
- 2 sites in Germany
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Contamac Ltd
Astigmatism
In-office Evaluation of Two Toric Soft Contact Lenses and a Spherical Soft Contact Lens
The purpose of this study is to determine the relative performance of a new toric soft contact lens against a toric and a spherical contact lens currently available in market, specifically with regards to the fit and visual…
- Trial name
- NCT00584727
- Testing
- senofilcon A toric contact lens, alphafilcon A toric, etafilcon A sphere
- Volunteers
- 96 people
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Myopia
Comparing The Performance Of Two Different Daily Disposable Lenses (MIKI)
The objective of the study is to evaluate and compare the performance of study test lens to study control lens, when worn on a daily disposable modality over a period of approximately one week each
- Trial name
- NCT04492397
- Testing
- Test Contact Lens, Control Contact Lens
- Where
- Canada
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Presbyopia
Safety & Efficacy of Pilocarpine Eye Solutions for Temporary Improvement of Near Vision in Presbyopic Adults
Volunteer participants are evaluated for eligibility during a Screening Visit; those meeting study inclusion/exclusion criteria are scheduled for 3 treatment visits.
- Trial name
- VISION-1 (NCT04657172)
- Testing
- Pilocarpine Ophthalmic
- Where
- 9 sites in United States
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- Eyenovia Inc.
Myopia
Evaluation of The Comfort of Orthokeratology Lenses Fit Using A New Software
As new orthokeratology fitting software emerges onto the market, it is of interest to assess their usefulness in guiding eye practitioners with lens fit.
- Trial name
- NCT05389072
- Testing
- control contact lens
- Where
- 4 sites in United States, Spain
- Volunteers
- 57 people, healthy volunteers welcome
- Sponsor
- CooperVision International Limited (CVIL)
Myopia
A Multi-Center Study Comparing the Clinical Performance of Two Silicone Hydrogel Lenses Over 1 Month of Daily Wear
A Multi-Center Study Comparing the Clinical Performance of Two Silicone Hydrogel Lenses Over 1 Month of Daily Wear
- Trial name
- NCT01952665
- Testing
- comfilcon A, lotrafilcon B
- Where
- 6 sites in United States
- Volunteers
- 63 people
- Sponsor
- CooperVision, Inc.
Presbyopia Correction, Presbyopia
Clinical Evaluation of Visual Performance, Spectacle Independence, and Patient Satisfaction With TECNIS PureSee Mini-Monovision and TECNIS PureSee-TECNIS Odyssey Mix-Match
The purpose of the study is to evaluate the binocular clinical endpoints of distance, intermediate, and near vision and patient reported outcomes utilizing mini-monovision versus mix-match approaches for the correction of…
- Conditions
- Presbyopia Correction, Presbyopia, Dysphotopsia, Visual Acuity
- Trial name
- NCT07860567
- Testing
- TECNIS PureSee IOL (Model DEN00V/DET150), TECNIS Odyssey IOL (Model DRN00V/DRT150)
- Where
- United States
- Volunteers
- 68 people
- Sponsor
- Dr. Daniel H. Chang, MD
Astigmatism
Comparison of Two Silicone Hydrogel Toric Contact Lenses
The purpose of this research study is to compare the performance of two different types of Alcon soft toric study contact lenses to obtain information on study lens orientation.
- Trial name
- NCT03392532
- Testing
- Lotrafilcon B toric contact lenses with HYDRAGLYDE, Lotrafilcon B toric contact lenses
- Where
- United States
- Volunteers
- 36 people
- Sponsor
- Alcon Research
Corneal Wavefront Aberration
Higher Order Aberration and Relationship With Soft Contact Lens Modulus
Higher order aberrations are imperfects in the eye that affect the quality of image projected onto the retina. Soft contact lenses are made of different materials with different stiffness.
- Trial name
- NCT06425432
- Testing
- OVITZ xwave aberrometer
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Southern College of Optometry
Refractive Errors
Academic Performance and Refractive Error
Refractive errors constitute the leading cause of visual disability worldwide and that myopia progresses dramatically when students reach school age.
- Trial name
- NCT04338880
- Where
- China
- Volunteers
- 10,000 people
- Sponsor
- Sun Yat-sen University
Myopia
Sustained Effect of Red-light Therapy for Myopia Control: A 2-Year Post-Trial Follow-up Study
To evaluate the long-term efficacy and safety of red-light therapy for myopia control over 2 years, and the potential rebound effect after treatment cessation.
- Trial name
- NCT06232161
- Testing
- Red-light therapy device, Spectacles
- Where
- China
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Beijing Airdoc Technology Co., Ltd.
Ametropia
Clinical Evaluation of HPT Treated Rigid Contact Lenses Made From Hexafocon A
This will be an up to six months, subject-masked, contralateral, parallel-group, randomised, daily wear study. All subjects will wear the Test lens in one eye and the Control lens in the other eye.
- Trial name
- NCT04525170
- Testing
- HPT treatment, untreated
- Where
- 2 sites in Germany
- Volunteers
- healthy volunteers welcome
- Sponsor
- Contamac Ltd
Refractive Error, Glaucoma
A Post-market Clinical Study to Collect Safety and Performance Data on Johnson & Johnson Surgical Vision Products
Retrospective collection of data from medical records, multicenter, post-market clinical follow-up study.
- Conditions
- Refractive Error, Glaucoma, Cataracts, Clear Lens Exchange
- Trial name
- NCT05394324
- Testing
- Intervention
- Where
- 13 sites in United States, Germany and 1 more
- Volunteers
- 1,674 people
- Sponsor
- Johnson & Johnson Surgical Vision, Inc.
Refractive Errors, Ametropia
Performance of Refractometers With Self-adjusting Lenses Compared to Cycloplegia in Children (REFRALENS)
This study aimed to compare refractive measurements using Vision-S™ 700, an immersive and compact phoropter with a tunable-focus lens, and Vision-R™ 800, a phoropter with a tunable-focus lens without immersion, with cycloplegic…
- Trial name
- REFRALENS (NCT06668246)
- Testing
- Vision-S™ 700, an immersive and compact phoropter with a tunable-focus lens, and Vision-R™ 800, a phoropter with a tunable-focus lens without immersion, with cycloplegic refraction serving as the gold
- Where
- France
- Volunteers
- 43 people
- Sponsor
- University Hospital, Brest
Myopia
The Collaborative Longitudinal Evaluation of Ethnicity and Refractive Error (CLEERE) Study
To compare and contrast normal eye growth, ocular component development, and refractive error development in Hispanic, African-American, and Asian schoolchildren with what happens in Caucasian children from the Orinda…
- Trial name
- NCT00000169
- Where
- 3 sites in United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- National Eye Institute (NEI)
Myopia
Investigation of Wearing Compliance of Spectacles for Myopia Control
The goal of this observational study was to compare the wearing patterns of spectacles prescribed for myopia control in juvenile wearers.
- Trial name
- NCT06590441
- Testing
- Myopia control spectacles
- Where
- 4 sites in United Kingdom
- Volunteers
- 53 people
- Sponsor
- CooperVision, Inc.
Myopia, Hyperopia
Corneal Epithelial Thickness Mapping by Anterior Segment Optical Coherence Tomography in Patients With Refractive Errors
This study evaluates corneal epithelial thickness using anterior segment optical coherence tomography (AS-OCT) in patients with refractive errors.
- Conditions
- Myopia, Hyperopia, Astigmatism, Emmetropia
- Trial name
- NCT07647146
- Where
- Egypt
- Volunteers
- 360 people, healthy volunteers welcome
- Sponsor
- Sohag University
Nearsightedness
Measuring the Peripheral Optical Quality of The Eye
The goal of the study is to quantify wavefront aberration profiles of the eye with and without contact lens across the visual field. This will enable us to investigate the impact of the aberration on retinal image quality.
- Trial name
- NCT03479827
- Testing
- Monofocal Contact Lens, Bifocal Contact Lens
- Where
- United States
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- University of Rochester
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