Clinical trials: Error, Refractive
Ametropia
Comparison of Two Toric Contact Lenses on Current Toric Wearers
The purpose of this study is to evaluate and compare the clinical performance of two toric contact lenses amongst 110 subjects, 2-week, single masked (subject), daily wear, randomized, bilateral, crossover study; 4 weeks…
- Trial name
- NCT00639379
- Testing
- senofilcon A toric, alphafilcon A toric
- Where
- 7 sites in United States
- Volunteers
- 89 people, healthy volunteers welcome
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Cognition Disorders
Impact of Glasses for Vision Problems on Cognitive Function in Rural Older Adults
The aim of this project is to explore whether vision correction can effectively slow cognitive decline in older adults. The primary question it seeks to answer is: Can providing free near and/or distance vision correction glasses…
- Trial name
- CLEVER (NCT06836440)
- Testing
- Free Prescription Glasses
- Where
- China
- Volunteers
- 964 people, healthy volunteers welcome
- Sponsor
- Yuju Wu
Hyperopia
Safety and Effectiveness of the TENEO 317 Model 2 (1.28 US) Excimer Laser for Laser In Situ Keratomileusis (LASIK) Surgery to Treat Hyperopia With or Without Astigmatism
This will be a multicenter, prospective, open label, non-randomized, single arm 12 month study, evaluating the safety and effectiveness of the TECHNOLAS TENEO 317 Model 2 (Software version "1.28 US") excimer laser when used in…
- Trial name
- NCT05264623
- Testing
- TENEO 317 Model 2 excimer laser
- Where
- 9 sites in United States
- Volunteers
- 140 people
- Sponsor
- Bausch & Lomb Incorporated
Myopia
Clinical Evaluation of Two Daily Disposable Silicone Hydrogel Contact Lenses
The purpose of this crossover study was to evaluate the end-of-day comfort of two commercially available, daily disposable, silicone hydrogel contact lenses.
- Trial name
- NCT01561560
- Testing
- Delefilcon A contact lenses, Narafilcon A contact lenses
- Where
- United States
- Volunteers
- 123 people
- Sponsor
- Alcon Research
Hyperopia, Long Sight
Zimbabwe Eyecare And Learning(ZEAL):Formative Research on Hyperopia and Educational Outcomes in Primary School Children
The purpose of this study is to determine whether uncorrected or corrected long-sightedness (hyperopia) has an impact on reading skills, in Grade 2 or Grade 4 school-aged children from Mashonaland Central province of Zimbabwe…
- Trial name
- ZEAL (NCT05538182)
- Testing
- Spectacles
- Where
- Zimbabwe
- Volunteers
- 1,883 people, healthy volunteers welcome
- Sponsor
- Queen's University, Belfast
Myopia
Four Week Performance Comparison Between Two Commercially Available Silicone Hydrogel Lenses
The purpose of this study is to compare the performance of two commercially marketed contact lenses when worn for up to 4 weeks in a daily wear modality.
- Trial name
- NCT01300767
- Testing
- Lotrafilcon B contact lens (AIR OPTIX® AQUA), Balafilcon A contact lens (PureVision® 2), Contact lens solution (Clear Care®)
- Volunteers
- 75 people
- Sponsor
- CIBA VISION
Refractive Error
Clinical Evaluation of DAILIES TOTAL 1® Performance in a Japanese Population
The purpose of this study is to compare DAILIES TOTAL1® (DT1) to 1-DAY ACUVUE® TruEye® (TE) for Investigator-rated successful lens centration in Japanese population.
- Trial name
- NCT02710292
- Testing
- Delefilcon A contact lenses, Narafilcon A contact lenses
- Where
- Japan
- Volunteers
- 104 people
- Sponsor
- Alcon Research
Myopia, Visual Fatigue
Impact of Various Myopia Management Strategies on Asthenopia Among Pediatric and Adolescent Populations
Different myopia control interventions have certain effects on ocular asthenopia in children and adolescents. As children and adolescents are in a critical period of visual development, the presence of asthenopia may lead to an…
- Trial name
- NCT07691671
- Volunteers
- 600 people
- Sponsor
- Tianjin Medical University Eye Hospital
Refractive Errors
Outcomes of a Trifocal IOL in Post-refractive Patients
To compare the prediction error of ORA vs formula for post-LASIK cataract patients when PanOptix IOL was implanted. Using post-operative outcomes to determine if preoperative IOL calculations, including Barrett TK, Barrett…
- Trial name
- TrIPLe (NCT04545073)
- Testing
- PanOptix
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Vance Thompson Vision ND
Astigmatism, Refractive Errors
Clinical Comparison of Toric Contact Lenses Fit Characteristics
The purpose of this study is to compare the fit characteristics between four Alcon commercially available toric contact lenses.
- Trial name
- NCT05805345
- Testing
- Delefilcon A toric soft contact lens, Lehfilcon A toric soft contact lens, Lotrafilcon B toric soft contact lens
- Where
- 7 sites in United States
- Sponsor
- Alcon Research
Myopia, Refractive Errors
A Clinical Trial to Evaluate the Vision Correction Safety and Efficacy of DSiHy Silicone Hydrogel Soft Contact Lens
This is a prospective, randomized, double-blind, parallel, active-controlled, multi-center clinical study. The purpose is to evaluate the safety and effectiveness wearing "DSiHy Silicone Hydrogel Soft Contact Lens".
- Trial name
- NCT06716372
- Testing
- DSiHy Silicone Hydrogel Soft Contact Lens, Daily Silicone Hydrogel Contact Lenses (oB)
- Where
- 3 sites in Taiwan
- Volunteers
- 134 people
- Sponsor
- Visco Vision Inc.
Myopia
The Influence of Atropine on Choroidal Thickness
Atropine eye drops are increasingly prescribed for the management of progressive myopia or short-sightedness. A previous study suggested that the back of the eye or choroid may be a part of the mechanism by which it induces its…
- Trial name
- NCT03158142
- Testing
- Atropine Sulfate 1% Oph Soln
- Where
- United States
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- State University of New York College of Optometry
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, High, With Cataract and Anterior Capsule Polished
The Influences Of Anterior Capsule Polishing On Anterior Capsular Changes and Intraocular Lenses Stability of Super High Myopic Eyes
A prospective study included 20 patients with super high myopia who underwent bilateral uneventful cataract. 360°anterior capsule polishing was performed with double-ended capsule polisher randomly in one eye, and the opposite…
- Trial name
- NCT03142269
- Testing
- 360°anterior capsule polishing
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- yin ying zhao
Myopia
A Clinical Comparison of Three Soft Daily Disposable Contact Lenses
This study aims to compare the clinical performance of the somfilcon A, nelfilcon A II 2 and omafilcon A II 2 daily disposable contact lenses.
- Trial name
- NCT02920983
- Testing
- somofilcon A, nelfilcon A II 2, omafilcon A ll 2
- Where
- United Kingdom
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Cataract, Corneal Astigmatism
Evaluation of the Impact of Corneal Width on Surgically Induced Astigmatism (SIA) and Functional Results After Bimanual 1.4 mm Microincision Cataract Surgery (B-MICS), Coaxial 1.8 mm MICS (C-MICS) and 2.4 mm Small Incision Cataract Surgery (C-SICS).
The aim of the study is to compare functional results and complications of 3 methods of cataract phacoemulsification: bimanual 1.4 mm cataract surgery (B-MICS), coaxial 1.8 mm cataract surgery (C-MICS) and coaxial 2.4 mm small…
- Conditions
- Cataract, Corneal Astigmatism, Corneal Incision Contracture
- Trial name
- MICS (NCT05510869)
- Testing
- Bimanual 1.4 mm microincision cataract surgery (B-MICS) with IOL implantation in a "wound-assisted" technique. In bimanual MICS group a self-sealing 1.4 mm wide incision was created supratemporally, Coaxial 1.8 mm microincision cataract surgery (C-MICS) with IOL implantation with an injector through the 1.8 mm wide incision created temporally., Coaxial 2.4 mm small incision cataract surgery (C-SICS) with IOL implantation with an injector through the 2.4 mm wide incision located temporally.
- Volunteers
- 90 people
- Sponsor
- Medical University of Lodz
Myopia, Astigmatism
Wavefront-guided Photorefractive Keratectomy (PRK) Versus Wavefront-guided Lasik for Myopia
A prospective comparison of eyes undergoing wavefront-guided LASIK in one eye and wavefront-guided PRK in their fellow eye for myopia.
- Trial name
- NCT01140594
- Testing
- Photorefractive keratectomy, Laser in-situ keratomileusis
- Where
- United States
- Volunteers
- 34 people, healthy volunteers welcome
- Sponsor
- Stanford University
Refractive Error
Clinical Investigation of Refraction Techniques
Prospective, multi-center, non-interventional, randomized, comparative clinical study to identify an optimal refractive technique that provides maximum plus refractive endpoint for best corrected distance visual acuity (BCDVA).
- Trial name
- NCT05461586
- Testing
- Refractive Technique (MR #1), Refractive Technique (MR #2)
- Where
- Australia
- Volunteers
- 35 people
- Sponsor
- Johnson & Johnson Surgical Vision, Inc.
Cataract, Nuclear Sclerosis
Evaluating the Need for the Pseudophakic Intraoperative Abberrometry in Toric IOL Implantation
To determine clinically significant difference in results obtained from cataract surgery using IA. One eye will receive aphakic measurements only and the fellow eye will receive aphakic and then pseudophakic measurements when…
- Conditions
- Cataract, Nuclear Sclerosis, Cortical Cataract, Posterior Subcapsular Cataract
- Trial name
- NCT03819842
- Testing
- Pseudophakic Measurement
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Alterman, Modi, & Wolter Ophthalmic Physicians & Surgeons
Myopia
the Efficacy of 0.01% Atropine for Near Work-induced Transient Myopia and Myopic Progression
Near work-induced transient myopia (NITM) is an important factor in permanent myopia (PM) development and progression. Atropine eye drop is beneficial in reducing initial NITM and slowing down myopic progression.Participants were…
- Trial name
- NCT06034366
- Testing
- 0.01% atropine, 0.9% sodium chloride
- Where
- 2 sites in China
- Volunteers
- 150 people
- Sponsor
- He Eye Hospital
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