Clinical trials: Error, Refractive
Ametropia
Safety and Efficacy of Different Add Powers With a New Presbyopic Lasik Treatment Algorithm
This is a prospective, comparative, randomized, controlled, open-label, single-surgeon, single-center PMCF clinical study whereby presbyopic patients undergoing refractive surgery will receive a SUPRACOR treatment for the…
- Trial name
- NCT04617080
- Testing
- SUPRACOR Regular, SUPRACOR Strong
- Where
- Philippines
- Volunteers
- 60 people
- Sponsor
- Bausch & Lomb Incorporated
Myopia
Visual Outcomes and Contrast Sensitivity After Myopic LASIK
Evaluate visual outcomes and contrast sensitivity for subjects undergoing bilateral myopic LASIK procedure using the 200 kHz WaveLight® FS200 Femtosecond Laser and the WaveLight® Allegretto Wave® Eye-Q Laser.
- Trial name
- NCT01746589
- Testing
- bilateral myopic LASIK
- Where
- United States
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Daniel S. Durrie, MD
Myopia
Safety and Efficacy of Implantable Collamer Lens Versus Implantable Phakic Lens IPCL in Myopic Patients; A Comparative Study
Phakic intraocular lenses (pIOL) have proven to be a great alternative to corneal refractive surgery in certain situations. They offer several advantages over corneal techniques, such as being suitable for high myopes and causing…
- Trial name
- NCT06058780
- Testing
- Implantable Collamer Lens (ICL), Implantable Intraocular Lens (IPCL)
- Where
- Egypt
- Volunteers
- 200 people
- Sponsor
- Al-Azhar University
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
Astigmatism, Myopia
The Berkeley Orthokeratology Study
To evaluate the relative efficacy of orthokeratology, primarily by assessment of changes in central corneal thickness, astigmatism, visual acuity, endothelial cell density, and corneal curvature.
- Trial name
- NCT00000123
- Testing
- Polymethyl Methacrylate-Silicone Contact Lenses, Polymethyl Methacrylate Contact Lenses
- Sponsor
- National Eye Institute (NEI)
Amblyopia
Efficacy of Visual Screening in Ontario
Amblyopia (lazy eye), is the leading treatable cause of vision loss in childhood. Uncorrected refractive errors (ie farsightedness) can lead to difficulties in school.
- Trial name
- NCT02458846
- Testing
- Crowded HOTV Acuity Test, Preschool Randot Stereoacuity Test, Plusoptix Autorefractor
- Where
- Canada
- Volunteers
- 2,597 people, healthy volunteers welcome
- Sponsor
- The Hospital for Sick Children
Refractive Error, Myopia
A Comparison of Two Contact Lenses
This study seeks to evaluate the clinical and subjective performance of two established soft contact lenses.
- Trial name
- NCT00700752
- Testing
- senofilcon A, balafilcon A
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Myopia
Comparative Study of the Wearing Satisfaction of Two Soft Contact Lens Designs.
To evaluate the wearing satisfaction of a new design of the PureVision soft contact lenses.
- Trial name
- NCT00768885
- Testing
- PureVision 1, PureVision 2
- Where
- Japan
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Bausch & Lomb Incorporated
Myopia, Hyperopia
Clinical Investigation of the Vision-R800 Device.
Randomized, bilateral, cross-over dispensing study of a standard and VR800 refraction and associated spectacle lenses.
- Conditions
- Myopia, Hyperopia, Astigmatism, Presbyopia
- Trial name
- NCT04208750
- Testing
- Vision R-800 Phoropter, Standard Phoropter
- Where
- United States
- Volunteers
- 119 people, healthy volunteers welcome
- Sponsor
- Pete Kollbaum, OD, PhD
Myopia
A Prospective Study on Clinical Effectiveness After SMILE Versus SMILE Xtra in Myopia
To evaluate the clinical efficacy and refractive stability of SMILE Xtra compared to SMILE in patients with myopia
- Trial name
- NCT06973278
- Testing
- SMILE, SMILE Xtra
- Where
- China
- Volunteers
- 200 people
- Sponsor
- Shanghai Zhongshan Hospital
Binocular Vision Disorder, Refractive Errors
Binocular Vision Anomalies After Cataract and Refractive Surgery
There are indications in the literature that binocular vision disorders may occur after cataract and corneal refractive surgery.
- Conditions
- Binocular Vision Disorder, Refractive Errors, Cataract
- Trial name
- NCT03592615
- Testing
- cataract surgery, Corneal refractive surgery
- Where
- United States
- Volunteers
- 51 people
- Sponsor
- Salus University
Refractive Errors
The Effect of Gabapentin (Neurentin) and Pregabalin (Lyrica) in Pain Reduction After Photorefractive Keratectomy
The studied patients will be given randomly one of three following drugs1:Gabapentin2: Pregabalin or placebo for 3 days after Photorefractive keratectomy surgery.
- Trial name
- PRK (NCT01122004)
- Testing
- Pregabalin
- Where
- Iran
- Sponsor
- Shahid Beheshti University of Medical Sciences
Myopia
Daily Disposable Silicone Hydrogel Contact Lens, Stenfilcon A, Clinical Study
Clinical evaluation of stenfilcon A compared with narafilcon A and delefilcon A This is a total 120 subject, randomized, open label, bilateral wear, two week crossover study (each lens for 1 week) evaluating the clinical…
- Trial name
- NCT02637804
- Testing
- stenfilcon A, narafilcon A, delefilcon A
- Volunteers
- 106 people
- Sponsor
- CooperVision, Inc.
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, Progressive
Management of Myopia in University Students Using Dual Focus Soft Contact Lenses
The purpose of the study is to quantify the effectiveness of Coopervision MiSight contact lenses in slowing the rate of myopia progression in university students.
- Trial name
- MoMUS (NCT05955638)
- Testing
- MiSight contact lenses, Proclear contact lenses
- Where
- 2 sites in United Kingdom
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- University of Bradford
Refractive Errors
Clinical Characterization of an Investigational Frequent Replacement Daily Wear Silicone Hydrogel Sphere Contact Lens
The primary objective of this study is to evaluate the overall clinical performance of an investigational silicone hydrogel contact lens over 7 days of daily wear.
- Trial name
- NCT04702984
- Testing
- LID021201 contact lenses, OPTI-FREE multipurpose solution
- Where
- 3 sites in United States
- Volunteers
- 39 people
- Sponsor
- Alcon Research
Myopia
Safety and Effectiveness of Wavefront-Guided LASIK Corrections of Myopic Refractive Errors
The purpose of this clinical trial is to demonstrate that wavefront-guided LASIK is safe and effective for the correction of myopic refractive errors.
- Trial name
- NCT01663363
- Testing
- LASIK correction of myopic refractive errors
- Volunteers
- 170 people, healthy volunteers welcome
- Sponsor
- Abbott Medical Optics
Refraction Error, Myopia
The MORE Study: Manifest vs. Online Refraction Evaluation
The assessment of the refractive state of the eye is a fundamental and important part of ophthalmic and optometric clinical practice.
- Conditions
- Refraction Error, Myopia, Astigmatism
- Trial name
- MORE (NCT03313921)
- Testing
- Online Manifest Refraction
- Where
- Netherlands
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- UMC Utrecht
Myopia, Refractive Error
An Evaluation of Myopia Control Lenses on Wearing Experience in Myopic Children
The goal of this research study is to understand the wearing experience of A.M.L. series of lenses in myopic children. The main questions it aims to answer are: How quickly and effectively children adapt to the A.M.L.
- Trial name
- NCT07354945
- Testing
- A.M.L. Series of Lenses
- Where
- China
- Volunteers
- 40 people
- Sponsor
- Essilor International
Scleral Lens Wearers
Efficacy of Scleral Contact Lenses for Daily Wear for Regular and Irregular Refractive Errors Compared to Habitually Worn Scleral Lenses
This study will be done with subjects who already habitually wear scleral contact lenses. The study lens is made with a material that is already widely available and has a new design.
- Trial name
- NCT02643095
- Testing
- scleral contact lens
- Volunteers
- 22 people
- Sponsor
- Jennifer Fogt
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