Clinical trials: Refraction Error
Refractive Error - Myopia Severe, Refractive Error - Myopia Simple
Early Feasibility Study of UV-Femtosecond Laser Assisted Lenticular Extraction
The purpose of this study is to evaluate the initial safety of the UV-FS laser in humans.
- Trial name
- NCT03021707
- Testing
- WaveLight® Ultraviolet Femtosecond (FS) Laser System, Laser Assisted Lenticular Extraction
- Where
- 4 sites in United States, Ireland and 1 more
- Volunteers
- 7 people
- Sponsor
- Alcon Research
Myopia
Myopia Control Efficacy of Second-generation DIMS Spectacle Lenses on Fast Progressing Myopes
The purpose of this study is to examine the efficacy and performance of the variant of Defocus Incorporated Spectacle lenses on controlling myopia progression in fast progressing myopic children.
- Trial name
- NCT05888792
- Testing
- Variant of Defocus Incorporated Spectacle lens (DG2)
- Where
- Hong Kong
- Volunteers
- 118 people, healthy volunteers welcome
- Sponsor
- The Hong Kong Polytechnic University
Cataract, Presbyopia
Clinical Trial With PRECIZON Presbyopic
The purpose of this clinical trial is to evaluate the effectiveness of the PRECIZON Presbyopic.
- Trial name
- NCT02409771
- Testing
- PRECIZON Presbyopic
- Where
- 6 sites in Belgium, Germany and 3 more
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Ophtec BV
Myopia
Topography-Guided Customized PRK Versus Q-value Adjusted PRK in Correction of Myopia With or Without Astigmatism
This study will include patients who will undergo PRK in both eyes, for each patient each eye will be randomly allocated to one of 2 procedures: topography-guided ablation in one eye (group I) and Q-factor customized ablation in…
- Trial name
- NCT03291873
- Testing
- PRK
- Where
- 2 sites in Egypt
- Volunteers
- 104 people
- Sponsor
- Kasr El Aini Hospital
Myopia
The Beijing Childhood Eye Study
Axial myopia has emerged as the leading cause of irreversible vision loss in East Asia, driven by its progression to sight-threatening complications including myopic macular degeneration, retinal detachment, open-angle glaucoma…
- Trial name
- BCES (NCT06931444)
- Where
- China
- Volunteers
- 3,760 people, healthy volunteers welcome
- Sponsor
- Beijing Tongren Hospital
Myopia, Myopia Progression
Contact Lenses to Slow Myopia Progression in Adults
Myopia (nearsightedness) can continue to worsen during young adulthood, increasing the risk of sight-threatening eye diseases later in life.
- Trial name
- NCT07747311
- Testing
- Dual Focus Soft Contact Lens, Single Vision Soft Contact Lens
- Where
- United States
- Volunteers
- 152 people
- Sponsor
- University of California, Berkeley
Myopia
Wavefront-guided LASIK for Correction of Myopia
Laser in situ keratomileusis is a successful procedure for the treatment of low to moderate myopia. Advances over the last decade have allowed LASIK to also correct higher order wavefront aberrations.
- Trial name
- NCT01682434
- Testing
- Laser in situ keratomileusis (LASIK)
- Where
- Denmark
- Sponsor
- Aarhus University Hospital
Corneal Astigmatism
Limbal Relaxing Incisions Versus Paired 4 mm Clear Corneal Incisions on Steep Meridian During Phacoemulsification
The goal of this is prospective, computer based randomized clinical trial is to compare the efficacy of reduction of the pre-existing corneal astigmatism at the time of cataract surgery in patients admitted in sohag university…
- Trial name
- LRI-CCI (NCT05593263)
- Testing
- surgical correction of astigmatism with cataract
- Volunteers
- 120 people
- Sponsor
- Sohag University
Myopia
To Study the Effects of Cordyceps Cicadae on Vision Care
Cordyceps cicadae is a traditional Asian herbal medicine with a variety of bioactive substances and curative effects similar to Cordyceps Cicadae, and it has been reported that anti-dry eye and eye protection ingredients can be…
- Trial name
- NCT05778409
- Testing
- Cordyceps cicadae extract
- Where
- Taiwan
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- China Medical University Hospital
Myopia, Astigmatism
Wavefront-guided LASIK Surgery Compared to Ray Tracing-Guided LASIK Surgery
We are enrolling participants aged 22 and older to have LASIK surgery in both eyes. We will perform wavefront-guided LASIK in one eye and ray tracing-guided LASIK in the fellow eye of each participant.
- Trial name
- NCT07078799
- Testing
- LASIK
- Where
- United States
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Stanford University
Myopia
Evaluation of Short Term Use of Experimental Eye Drops BHVI2, 0.02% Atropine and BHVI2 Plus 0.02% Atropine Eye Drops
To assess the one-month ocular effects of nightly application of experimental BHVI2 and 0.02% atropine eye drops either alone or in combination, in children aged between 6 to 13 years old with myopia and randomized to use of…
- Trial name
- NCT03690414
- Testing
- Experimental BHVI2, Atropine sulfate 0.02% eye drops, Combination eye drops
- Where
- Vietnam
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Hai Yen Eye Care
Myopia, Cornea
Euclid Phoenix Lens Design Trial
The "first fit" success rate of the current Euclid orthokeratology "MAX" lens design will be compared to that of the new Euclid orthokeratology MAX "Phoenix" lens design in 30 children.
- Trial name
- NCT06389916
- Testing
- Euclid orthokeratology MAX (current design), Euclid orthokeratology MAX Phoenix (new design)
- Where
- 5 sites in United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Euclid Systems Corporation
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
Refractive Error, Corneal Implantation
Piggyback Sulcoflex Toric IOL for Correcting Refractive Error Following Corneal Transplantation
A prospective study to evaluate the safety and efficacy of a piggyback sulcoflex toric intraocular lens in pseudophakic patients for correcting refractive errors following corneal transplantation
- Conditions
- Refractive Error, Corneal Implantation, Intraocular Lens Implantation
- Trial name
- NCT01718184
- Testing
- toric intraocular lens implantation, Sulcoflex intraocular lens implantation
- Where
- Israel
- Volunteers
- 25 people, healthy volunteers welcome
- Sponsor
- Rabin Medical Center
Myopia
A Study to Evaluate a Modified Contact Lens
This study is being conducted to evaluate the product performance of SofLens daily disposable contact lenses packaged in an investigational Test solution versus SofLens daily disposable contact lenses packaged in the currently…
- Trial name
- NCT01391364
- Testing
- SofLens in investigational solution, SofLens in currently marketed solution
- Where
- United States
- Volunteers
- 438 people
- Sponsor
- Bausch & Lomb Incorporated
Refractive Errors
Investigation of the Accuracy of an Automated Refractor to Provide Well-tolerated Eyeglass Prescriptions
At the New England College of Optometry in Boston, MA, subjects ages 18-65 who have received or are receiving treatment for refractive error who choose to enroll in the study will be evaluated using subjective refraction and…
- Trial name
- NCT06883032
- Testing
- AR Eyeglasses first, SR Eyeglasses second, SR Eyeglasses first, AR Eyeglasses second
- Where
- United States
- Volunteers
- 92 people, healthy volunteers welcome
- Sponsor
- PlenOptika, Inc.
Refractive Errors
Measurement of Refractive SE Following Implantation of LS313 MF30 IOL
This Study determines the most precise method for measuring post-operative refraction following implantation of the asymmetric multifocal LS-313 MF30 comparing the results of Refraction of the different Autorefractor Keratometers…
- Trial name
- NCT03292614
- Testing
- Measurements of the postoperative refraction
- Where
- Germany
- Volunteers
- 25 people
- Sponsor
- Dietrich-Bonhoeffer-Klinikum
Myopia
Vistakon Investigational Lens Worn as a Single Use Daily Wear
This study is intended to show that the investigational contact lens is clinically equivalent to a currently approved contact lens, when worn as single-use on a daily basis.
- Trial name
- NCT01031004
- Testing
- narafilcon B, etafilcon A
- Where
- 3 sites in United States
- Volunteers
- 50 people
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Myopia
Investigation of the Regulation of Retinal and Choroidal Blood Vessels in Various AL Based on WF SS-OCTA Detection With Changes in Body Position
This prospective observational study aims to understand the effects of different subaxial body positions on choroidal and retinal blood vessel density.
- Trial name
- NCT06587776
- Volunteers
- 60 people
- Sponsor
- Science and Technology Department of Sichuan Province
Myopia
Noninvasive and Dynamic Monitoring the Biological Parameters of Eyes in Different Age Groups
Myopia is the most common refractive eye disease worldwide. The number of cases is up to 2 billion. In recent years, the incidence of myopia in China is obviously rising trend.
- Trial name
- NCT05250440
- Where
- China
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- Zhongnan Hospital
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