Clinical trials: Refractive Error
Ametropia, Refractive Error
Post Marketing Clinical Study on the Efficacy of Lenses From a New Prescription Protocol
The goal of this clinical trial is to assess improvements in visual performance and patient outcomes in wearing new spectacle lenses in general population. The two spectacle lenses will be compared after two weeks of wearing.
- Trial name
- ATLANTIC (NCT07168564)
- Testing
- AVA lenses, Standard lenses
- Where
- United States
- Volunteers
- 120 people
- Sponsor
- Essilor International
Cataract, Refractive Error
Community-Based Eye Screening With Structured Referral Tracking for Preventing Avoidable Blindness in Adults in Rawalpindi, Pakistan
This cluster randomized controlled trial aims to evaluate the effectiveness of a Structured Referral Tracking (SRT) intervention in improving referral completion among adults identified with avoidable blindness during…
- Conditions
- Cataract, Refractive Error, Diabetic Retinopathy
- Trial name
- SIGHT (NCT07611682)
- Testing
- Structured Referral Tracking (SRT)
- Where
- Pakistan
- Volunteers
- 500 people
- Sponsor
- Health Services Academy, Islamabad, Pakistan
Cornea; Ectasia, Refractive Errors
Corneal Elastography and Patient Specific Modeling
The goal of this research is to develop measurement tools and simulation technology for characterizing and predicting individual responses to corneal treatments and for advancing understanding of corneal ectasia risk factors.
- Conditions
- Cornea; Ectasia, Refractive Errors, Keratoconus
- Trial name
- NCT03030755
- Testing
- Optical coherence tomography
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- The Cleveland Clinic
Cataract (Post-operative Cataract Surgery Follow-up), Refraction Error
Can Tailored Surgical Incisions Reduce Refractive Error and Dependence on Glasses After Cataract Surgery?
Astigmatism is a common cause of continued dependence on glasses after cataract surgery and may lead to patient dissatisfaction with surgical outcomes.
- Trial name
- AST-2 (NCT07623317)
- Testing
- Adapted clear corneal incisions
- Volunteers
- 100 people
- Sponsor
- Linkoeping University
Glaucoma, Suspect, Diabetic Retinopathy
Eye Health Intervention Study in Upper Manhattan
Individuals living in Upper Manhattan have limited access to eye care, high vision impairment rates, and poor ocular health outcomes.
- Conditions
- Glaucoma, Suspect, Diabetic Retinopathy, Cataract, Refractive Errors
- Trial name
- EYES-UM (NCT06112431)
- Testing
- Intervention, Usual Care
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Columbia University
Myopia, Progressive Myopia
Atropine Alone vs Atropine Plus Bifocal Spectacles for Myopia Control in Children
Background: Myopia (nearsightedness) is a growing global health concern, projected to affect 50% of the world population by 2050.
- Conditions
- Myopia, Progressive Myopia, Refractive Errors
- Trial name
- COMBAT-Myopia (NCT07614113)
- Testing
- Atropine Sulfate 0.05% Ophthalmic Solution, Bifocal Spectacles
- Where
- Pakistan
- Volunteers
- 210 people
- Sponsor
- University of Faisalabad
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
Cataract, Refractive Errors
Strengthening Community- to- Hospital Eye Care Pathways From Boko Eye Care Center in Rural Assam
This operational research project aims to strengthen continuity of eye care delivery between community screening and hospital-based treatment in rural Assam by redesigning referral pathways from the Boko Eye Care Center (ECC) to…
- Trial name
- NCT07333248
- Testing
- Experimental: Integrated Referral and Engagement Model
- Where
- India
- Volunteers
- 2,000 people
- Sponsor
- Seva Canada Society
Presbyopia, Refractive Error
Phase 3 Evaluation of the Safety and Efficacy of LNZ100 & LNZ101 for the Treatment of Presbyopia
Phase 3 study to evaluate the safety and effectiveness of LNZ100 \& LNZ101 for the treatment of Presbyopia.
- Conditions
- Presbyopia, Refractive Error, Eye Diseases, Near Vision
- Trial name
- CLARITY 1 (NCT05656027)
- Testing
- Aceclidine+Brimonidine combination ophthalmic solution, Aceclidine ophthalmic solution, Brimonidine
- Where
- 25 sites in United States
- Volunteers
- 469 people, healthy volunteers welcome
- Sponsor
- LENZ Therapeutics, Inc
Presbyopia, Near Vision
Phase 3 Safety Study of LNZ100 and LNZ101 for the Treatment of Presbyopia Subjects
Safety Study of the Long-Term Safety of LNZ100 \& LNZ101 in Presbyopic Subjects
- Conditions
- Presbyopia, Near Vision, Refractive Error, Eye Diseases
- Trial name
- NCT05753189
- Testing
- Aceclidine+Brimonidine combination ophthalmic solution, Aceclidine ophthalmic solution, Vehicle
- Where
- 40 sites in United States
- Volunteers
- 362 people, healthy volunteers welcome
- Sponsor
- LENZ Therapeutics, Inc
Down Syndrome, Refractive Errors
Dilated Versus Non-Dilated Wavefront Corrections for Patients With Down Syndrome
Individuals with Down syndrome (DS) live with visual deficits due, in part, to elevated levels of higher-order optical aberrations (HOA).
- Trial name
- NCT05059041
- Testing
- Dilated Refraction, Non-Dilated Refraction
- Where
- 2 sites in United States
- Volunteers
- 42 people
- Sponsor
- Ohio State University
Cataract, Glaucoma
Village-Integrated Eye Worker Trial II - Pilot
The vast majority of blindness is avoidable. The World Health Organization (WHO) estimates that 80% of cases of visual impairment could be prevented or reversed with early diagnosis and treatment.
- Conditions
- Cataract, Glaucoma, Age Related Macular Degeneration, Diabetic Retinopathy
- Trial name
- VIEW II Pilot (NCT03278587)
- Testing
- Community-based screening program, Cataract camp program, Community health worker program
- Where
- Nepal
- Volunteers
- 87,992 people, healthy volunteers welcome
- Sponsor
- University of California, San Francisco
Ametropia, Myopia
Clinical Investigation of Proclear® 1 Day and MyDay® Sphere Contact Lenses
The aim of this study is to evaluate and compare the performance of two soft contact lenses.
- Trial name
- NCT07104773
- Testing
- Control Lens (omafilcon A), Test Lens (stenfilcon A)
- Where
- Canada
- Volunteers
- 44 people
- Sponsor
- CooperVision International Limited (CVIL)
Corneal Wavefront Aberration, Refractive Errors
Factors Influencing Subjective Visual Quality in Human Eyes
To assess subjective visual symptoms using the QoV questionnaire, measure pupil size using the Atongmu Pupillometer, measure wavefront aberrations using the OPD-Scan III Aberrometer, and measure/calculate the effective optical…
- Trial name
- NCT07518316
- Testing
- Corneal Refractive Surgery
- Volunteers
- 300 people
- Sponsor
- Tianjin Eye Hospital
Myopia: Refractive Error
Evaluation of Novel Spectacles Intended for Myopia Management in a Short-Term Study
The primary objective of this study is to evaluate the visual acuity, wearability, and quality of vision with two novel multifocal glasses designs in habitual myopia control glasses wearers, in a non-dispensing study after…
- Trial name
- NCT07497672
- Testing
- Habitual myopia glasses, Myopia Glasses A, Myopia Glasses B
- Volunteers
- 20 people
- Sponsor
- Myoptechs, Inc
Refractive Error Correction
Clinical Outcomes of the Use of a Femtosecond Laser on an Implanted Intraocular Lens
This is a prospective non-randomized patient controlled single center study which is designed to evaluate the clinical outcomes of the treatment of an implanted intraocular lens using a low-energy femtosecond laser for refractive…
- Trial name
- NCT07473557
- Testing
- Device
- Where
- Panama
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Perfect Lens, LLC
Myopia, Myopic Astigmatism
Machine Learning Prediction of 1-Year Refractive Error After SMILE
This retrospective single-center observational study is designed to develop and internally validate a multi-output machine learning model for predicting 1-year postoperative refractive prediction error after small incision…
- Conditions
- Myopia, Myopic Astigmatism, Refractive Error - Myopia Axial
- Trial name
- SMILE (NCT07478419)
- Where
- China
- Volunteers
- 1,100 people
- Sponsor
- Tongji University
Refractive Error
A PHASED, PROSPECTIVE, MULTI-CENTER STUDY OF THE ELITA SYSTEM
This study will be a 2-phase, prospective, multicenter, open-label, non-comparative, non-randomized clinical investigation to confirm the safety and effectiveness of the ELITA system.
- Trial name
- NCT05713253
- Testing
- ELITA System
- Where
- 2 sites in United States
- Volunteers
- 96 people
- Sponsor
- Johnson & Johnson Surgical Vision, Inc.
Refractive Errors
Morphological Characteristics of the Maxillomandibular Region in a 3D Representation and the Refractive Status of the Eye
The goal of this observational study is to learn more about the relationship between the size and shape of the eye and the shape of the face in healthy young adults.
- Trial name
- NCT07460557
- Testing
- No intervention; Observational study
- Where
- Croatia
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- University of Zagreb
Refractive Errors
Cognitive Level Enhancement Through Vision Exams and Refraction
The investigators aim to conduct a mixed-method study in which a randomised controlled trial (RCT) and a descriptive qualitative study will be conducted.
- Trial name
- CLEVER (NCT05458323)
- Testing
- Free near and Distance Vision glasses
- Where
- India
- Volunteers
- 820 people
- Sponsor
- Queen's University, Belfast