Clinical trials: Error, Refractive
Refractive Errors
Investigation of the Accuracy of a Low-cost, Portable, Autorefractor to Provide Well-tolerated Eyeglass Prescriptions
At the Aravind Eye Hospital (AEH) in Madurai, India, patients ages 18-40 receiving treatment for refractive error who choose to enroll in the study will be evaluated using subjective refraction and objective refraction, by way of…
- Trial name
- NCT03615612
- Testing
- QuickSee refractive error assessment + glasses
- Where
- India
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins University
Anisometropia, Hyperopia
Effect of Light-Blocking Lenses on Hyperopic Anisometropic Children
To evaluate the effectiveness of light-blocking lenses in promoting emmetropization and reducing anisometropia in children with hyperopic anisometropia, and to assess the impact of light-intercepting lenses on visual function in…
- Trial name
- NCT07142928
- Testing
- light-blocking lenses, single-vision lenses
- Where
- China
- Volunteers
- 90 people
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Ametropia
Evaluation of Monthly Replacement Lenses in Habitual Soft Contact Lens Wearers Who Report Frequent Digital Devise Use
To evaluate the clinical performance of two monthly silicone hydrogel contact lenses in habitual wearers of frequent replacement (FRP) lenses when worn for 1-month.
- Trial name
- NCT05166902
- Testing
- Lens A (comfilcon A lens), Lens B (lehfilcon A lens)
- Where
- 4 sites in United States, Canada
- Volunteers
- 67 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Presbyopia
Clinical Validation Study of Comfilcon A Multifocal Toric Contact Lenses
This is a study to evaluate the clinical performance and subjective acceptance of an investigational contact lens (test), compared to a marketed lens (control) in an in-office setting.
- Trial name
- NCT03417557
- Testing
- Comfilcon A lens (test), Omafilcon B lens (control)
- Where
- United States
- Volunteers
- 20 people
- Sponsor
- CooperVision, Inc.
Astigmatism, Cataract
Femtosecond Laser Assisted Keratotomies for the Management of Corneal Astigmatism
A cataract is a clouding of the lens that occurs naturally with age. Cataract surgery involves removal of the cloudy lens and replacement with an artificial one.
- Trial name
- NCT04676451
- Testing
- Femto-AK
- Where
- United States
- Volunteers
- 94 people
- Sponsor
- Milton S. Hershey Medical Center
Myopia, Progressive
Low-dose Atropine for Myopia Control in Children
Myopia (nearsightedness) is the most common eye disorder. Only second to age, it is the main risk factor for major degenerative eye diseases such as glaucoma, macular degeneration or retinal detachment.
- Trial name
- AIM (NCT03865160)
- Testing
- Atropine eye drops, 0.01%, Atropine eye drops, 0.02%
- Where
- 19 sites in Germany
- Volunteers
- 302 people
- Sponsor
- University Eye Hospital, Freiburg
Refractive Errors, Accommodation Disorder
Choroidal Thickness Change in Response to Physiological and Refractive Changes
There is a great need for precise and repeatable measurements of the choroidal thickness. Including the diurnal physiological changes, accommodation and refractive error impact on those measurements.
- Trial name
- NCT03906279
- Where
- Poland
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Wrocław University of Science and Technology
Hyperopia and Myopia
Evaluation of a New Laser Refractive Vision Correction Using the TENEO™ 317 Model 2
Prospective, post market clinical follow up study with a three months postoperative follow up to evaluate the visual and refractive outcomes of OCTAVIUS treatment when used as intended.
- Trial name
- NCT06997003
- Testing
- Anterior treatment mode, Total treatment mode
- Where
- Czechia
- Volunteers
- 81 people
- Sponsor
- Bausch & Lomb GmbH
Astigmatism
Clinical Performance of Habitual Hydrogel vs. Silicone Hydrogel Toric Contact Lenses
Evaluate the clinical performance of existing wearers of hydrogel toric lenses when refitted with Avaira toric silicone hydrogel contact lenses over 1 week of wear.
- Trial name
- NCT02142361
- Testing
- enfilcon A
- Where
- Spain
- Volunteers
- 60 people
- Sponsor
- CooperVision, Inc.
Ametropia
One-month Clinical Evaluation of Silicone Hydrogel Definitive 65 HPT Contact Lenses
Comparison of different contact lens materials.
- Trial name
- NCT02312323
- Testing
- Definitive 65 HPT contact lenses, Definitive 65 contact lenses
- Where
- 2 sites in Germany
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- Contamac Ltd
Presbyopia
Reading Glass on Livelihoods and Quality of Life in Rural Bangladesh
The issue of uncorrected Presbyopia is an emerging health and livelihoods problem in Bangladesh. Presbyopia is easily corrected with an appropriate pair of reading glasses.
- Trial name
- NCT03719196
- Testing
- Reading glass
- Where
- Bangladesh
- Volunteers
- 824 people
- Sponsor
- Brac
Myopia, Progressive
Choroidal Response to Novel Spectacle Lens to Control Myopia Progression
Diurnal variations in the thickness of the choroid have been reported in the literature, and, more recently, the role of the choroid has been studied with respect to its role in myopia (near-sightedness) progression.
- Trial name
- CHERRY (NCT03818880)
- Testing
- Novel spectacle lens design
- Where
- Canada
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- SightGlass Vision, Inc.
Keratoconus, Keratoconus, Artificial Intelligence, Support Vector Machine
Predicting Manifest Astigmatism in Keratoconus Patients.
The cornea of the human eye has several functions. It is transparent to allow light into the eye and its shape focuses the incoming light onto the retina.
- Trial name
- NCT06798779
- Testing
- Glasses, Corneal topography
- Where
- United Kingdom
- Volunteers
- 800 people
- Sponsor
- Royal Devon and Exeter NHS Foundation Trust
Myopia, Ametropia
LED Low-Intensity Red Light for Myopia Control in Youth: Efficacy and Safety Study
The purpose of this clinical trial was to investigate the efficacy and safety of repetitive low-intensity single-wavelength red light from an LED light source in controlling myopia progression in children and adolescents.
- Trial name
- NCT07375589
- Testing
- Red light treatment with 1.6mW LED light source, Red light treatment with 0.001mW LED light source
- Where
- China
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Cataract, Astigmatism
Observational Prospective Clinical Investigation on Monofocal Toric Intraocular Lens
Evaluation, at least one-year long-term, of the clinical performance and safety of Mini Toric Ready Intraocular Lens (IOL), a monofocal toric intraocular lens.
- Trial name
- NCT06250855
- Testing
- Mini Toric IOL
- Where
- 2 sites in Romania
- Volunteers
- 105 people
- Sponsor
- SIFI SpA
Presbyopia, Low Vision
Ocular Biomarkers for Successful Premium Trifocal Intra-ocular Lenses Implantation
The purpose of this study is to identify ocular biomarkers that can predict the success of phacoemulsification with bilateral AT LISA try 839MP (Carl Zeiss Meditec AG) implantation to achieve satisfactory post-post-operativly…
- Trial name
- NCT05863247
- Testing
- Patient Reported Outcomes / Biometric data revision
- Where
- Portugal
- Volunteers
- 154 people, healthy volunteers welcome
- Sponsor
- Hospital dos Lusíadas
Pseudoexfoliation Syndrome in Cataract Myopic Eyes
Pseudoexfoliation Syndrome in Myopes
A retrospective study of 5753 eyes of cataract surgery patients was conducted at our Clinic. Ocular optical components measured by optical low coherence reflectometry biometer LENSTAR LS 900® of the cataract myopic eyes with…
- Trial name
- NCT01637740
- Volunteers
- 5,753 people
- Sponsor
- General Hospital Sveti Duh
Myopia Progressing
3D Designed Defocus Lenses on Myopia Control in Children and Adolescents
This study aims to evaluate the effectiveness of lenses with 3D Designed Defocus in controlling the progression of myopia in children and adolescents, and to explore the feasibility of effective design, and apply personalized…
- Trial name
- NCT07284147
- Testing
- Defocus Lenses
- Where
- China
- Volunteers
- 144 people, healthy volunteers welcome
- Sponsor
- Shanghai Eye Disease Prevention and Treatment Center
Age-Related Macular Degeneration, Polypoidal Choroidal Vasculopathy
Pharmacogenomic Study on Anti-VEGF Medicine in Treatment of Macular Neovascular Diseases
Macular neovascular diseases including age-related macular degeneration (AMD), polypoidal choroidal vasculopathy (PCV), pathological myopia (PM) and etc. can cause severe vision loss.
- Conditions
- Age-Related Macular Degeneration, Polypoidal Choroidal Vasculopathy, Pathological Myopia, Conbercept
- Trial name
- NCT03128463
- Testing
- Intravitreal injection of conbercept
- Where
- China
- Volunteers
- 5,000 people
- Sponsor
- Xun Xu
Cataract, Astigmatism
Assessing the Astigmatism Reducing Effect With Toric IOLs in Eyeswith Low Astigmatism
Comparison of the astigmatism reducing effect of a toric IOL with a non toric IOL in eyes with low corneal astigmatism.
- Trial name
- Low Asti (NCT03538964)
- Testing
- toric intraocular lens, non toric intraocular lens
- Where
- Austria
- Volunteers
- 25 people
- Sponsor
- Prim. Prof. Dr. Oliver Findl, MBA
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