Clinical trials: Refractive Error
Refractive Errors
Correlation Between Refraction and Biometric Parameters
To document the refractive status of Chinese schoolchildren and evaluate the association between the degree of refraction and biometric parameters.
- Trial name
- NCT04346251
- Where
- China
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
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
Presbyopia, Refractive Errors
Safety and Efficacy of a Sub-epitheilal Transform™ Corneal Allograft (TCA) for Presbyopia Correction
The objective of this clinical study is to evaluate the safety and effectiveness of subepithelial implantation of the Allotex TransForm corneal allograft (TCA) for improving near vision in presbyopic subjects.
- Trial name
- NCT03675438
- Testing
- Sub-epitheilal TCA Inlay
- Where
- 11 sites in Austria, Belgium and 4 more
- Volunteers
- healthy volunteers welcome
- Sponsor
- Allotex, Inc.
Refractive Errors, Myopia (Disorder)
Environmental Health and Myopia Prevention and Control
Myopia is one of the major causes of low visual acuity during childhood. It is generally more prevalent in urban areas than in rural areas.
- Trial name
- NCT04161326
- Where
- China
- Volunteers
- 100,000 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Ametropia
Ocular Responses to Short and Long-term Lens Wear
The purpose of this study was to determine whether ocular surface sensitivity to pneumatic, mechanical and chemical stimulation would be affected by the use of the combination of a specific silicone hydrogel lens material with…
- Trial name
- NCT00722891
- Testing
- Purevision Lenses with ReNu Multiplus, Purevision Lenses with Optifree RepleniSH
- Where
- Canada
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Bausch & Lomb Incorporated
Refractive Error, Visual Impairment
The Baltimore Reading and Eye Disease Study
The Baltimore Reading and Eye Disease Study (BREDS) is a two year study to determine the prevalence of vision problems in an early school age population with reading difficulty.
- Conditions
- Refractive Error, Visual Impairment, Convergence Insufficiency, Reading Disabilities
- Trial name
- BREDS (NCT02607384)
- Testing
- Eyeglass wearing, Orthoptic exercises, Specialist referral
- Volunteers
- 328 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins University
Myopia
Myopia:the Role of Cone Opsin Mutations & Glasses That Control Axial Elongation
1. To determine the effect of spectacles with a red blocking filter on myopia progression in children. 2. To determine the effect of spectacles with a holographic diffuser that spreads incident light rays over an angle of 0.5…
- Trial name
- NCT01923675
- Testing
- Spectacles with red-blocking tint, Spectacles with holographic diffuser and color neutral tint, Spectacles with holographic diffuser and red-blocking tint
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Washington
Refractive Errors
Investigating the Effect of Using Myopia Prediction Algorithm on Myopia Children
In this study, the investigators aim to perform a prospective, randomized controlled study to compare the myopia development between myopia children using myopia prediction algorithm and myopia children without using myopia…
- Trial name
- NCT04044755
- Testing
- Myopia prediction algorithm
- Where
- China
- Volunteers
- 2,138 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Amblyopia, Refractive Errors
Vision Screening for the Detection of Amblyopia
INTRODUCTION. Amblyopia is defined as the loss of visual acuity (VA) in one or both eyes, without any obvious structural or pathological anomalies.
- Conditions
- Amblyopia, Refractive Errors, Anisometropia, Strabismus
- Trial name
- NCT01430247
- Testing
- Amblyopia screening
- Where
- Croatia
- Volunteers
- 7,000 people
- Sponsor
- Mladen Busic
Eye--Refractive Errors
Effect of Using Myopia Prediction Algorithm
In this study, the investigators aim to perform a prospective, randomized controlled study to compare the myopia development between children using myopia prediction algorithm and children without using myopia prediction…
- Trial name
- NCT04005014
- Testing
- Myopia prediction algorithm
- Volunteers
- 1,680 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Retinopathy of Prematurity
Refractive Error and Biometry in Retinopathy of Prematurity
The investigators compared long-term refractive and biometric outcomes in children with retinopathy of prematurity who received two different anti-vascular endothelial growth factor agents.
- Trial name
- NCT03334513
- Testing
- Bevacizumab, Ranibizumab
- Volunteers
- 35 people
- Sponsor
- San Ni Chen
Refractive Errors
Direct Comparison of SVOne Obtained Refraction to Subjective Manifest Refraction
The purpose of the study is to compare the final glasses prescription based on refraction obtained with SVOne device to the final prescription obtained via subjective manifest refraction.
- Trial name
- NCT03222661
- Testing
- Refraction
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Smart Vision Labs
Refractive Error
Fitting Children With Contact Lenses
The purpose of this three-month study is to compare the quality of life and ease of fit among children wearing investigational single-vision contact lenses, commercially marketed single-vision contact lenses, and commercially…
- Trial name
- COPPER (NCT01233089)
- Testing
- Lotrafilcon B contact lens, investigational, Lotrafilcon B contact lens, commercial (AIR OPTIX AQUA), Lotrafilcon B multifocal contact lens, commercial (AIR OPTIX AQUA MULTIFOCAL)
- Where
- Canada
- Volunteers
- 194 people
- Sponsor
- CIBA VISION
Amblyopia
Observational Study of Optical Correction for Strabismic Amblyopia in Children 3 to <7 Years Old
This study will evaluate the effectiveness of refractive correction alone for the treatment of previously untreated strabismic or combined-mechanism amblyopia in children 3 to <7 years old with visual acuity of 20/40 to 20/400
- Trial name
- ATS13 (NCT00669539)
- Where
- United States
- Volunteers
- 156 people
- Sponsor
- Jaeb Center for Health Research
Normal Subjects, Ametropia
Project Gullstrand - European Project for the Determination of Average Biometric Values of Human Eyes
The purpose of this study is to determine the average values of human ocular biometry and to correlate these values with visual function.
- Trial name
- Gullstrand (NCT01173614)
- Where
- Spain
- Volunteers
- 1,646 people, healthy volunteers welcome
- Sponsor
- European Vision Institute Clinical Research Network
Refractive Error
The Evolutionary Model of Mild-to-moderate Myopia in China
Myopia has emerged as a major health issue in east Asia, because of its increasingly high prevalence in the past few decades (now 80-90% in school-leavers), and because of the sight-threatening pathologies associated with high…
- Trial name
- NCT02667509
- Where
- China
- Volunteers
- 852,441 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Myopia
The Efficacy and Safety of Periocular Acupoint Stimulation on Myopia Progression in Children
Myopia is widely one of the three commonly detected refractive errors. Myopia is usually managed by correction through glasses or contact lenses. Other alternative available include surgery, drugs and acupuncture.
- Trial name
- NCT02064660
- Testing
- massager
- Where
- South Korea
- Volunteers
- 20 people
- Sponsor
- Korean Medicine Hospital of Pusan National University
Myopia, Astigmatism
Safety and Efficacy Evaluation of a New Contact Lens Disinfecting Solution in Soft Contact Lens Wearers
The purpose of this study is demonstrate substantial equivalence of an investigational contact lens disinfecting solution to a commercially available contact lens solution in silicone hydrogel and soft contact lens wearers.
- Conditions
- Myopia, Astigmatism, Hyperopia, Refractive Error
- Trial name
- NCT01912768
- Testing
- FID 120947A contact lens disinfecting solution, renu fresh multi-purpose solution, Soft contact lenses
- Volunteers
- 362 people
- Sponsor
- Alcon Research
Myopia, Astigmatism
Safety and Efficacy Evaluation of a New Contact Lens Disinfecting Solution in Gas Permeable Contact Lens Wearers
The purpose of this study is demonstrate substantial equivalence of an investigational contact lens disinfecting solution to a commercially available contact lens solution in gas permeable lens wearers.
- Conditions
- Myopia, Astigmatism, Hyperopia, Refractive Error
- Trial name
- NCT01912781
- Testing
- FID 120947A contact lens disinfecting solution, Boston Simplus multi-action solution, Gas permeable contact lenses
- Volunteers
- 112 people
- Sponsor
- Alcon Research
Refractive Error, Myopia
Clinical Performance of a New Daily Disposable Contact Lens Worn in an Established Contact Lens Wearing Population
This study seeks to evaluate the clinical and subjective performance of a new daily disposable soft contact lens.
- Trial name
- NCT00708643
- Testing
- Habitual Silicone Hydrogel Contact Lens, narafilcon A
- Where
- Canada
- Volunteers
- 80 people
- Sponsor
- Johnson & Johnson Vision Care, Inc.