Clinical trials: Astigmatism, active
Myopia, Astigmatism
Evaluation of Orthokeratology Lenses With a 5MM Optic Zone Diameter
To evaluate the clinical performance and user-reported experience of Paragon CRT contact lenses with a 5mm Optic Zone Diameter (OZD)
- Trial name
- NCT07751172
- Testing
- Lens A (paflufocon D)
- Where
- 3 sites in United States, Spain
- Volunteers
- 70 people
- Sponsor
- CooperVision International Limited (CVIL)
Myopia, Astigmatism
Wavelight Plus Sightmap-LASIK vs. Wavefront-Optimized-LASIK
The goal of this clinical trial is to learn if the wavelight plus Sightmap (WLP) method or the wavefront-optimized (WFO) method for calculating LASIK customization treatment gives better vision, better satisfaction, and fewer…
- Trial name
- NCT07855094
- Testing
- LASIK calculated ablation using Wavefront-Optimized, wavelight plus Sightmap (WLP) Guided LASIK calculated
- Where
- United States
- Volunteers
- 49 people
- Sponsor
- 59th Medical Wing
Astigmatism
Wear Experience With Daily Disposable Contact Lenses for Astigmatism Over a Long-Wear Day
The purpose of this study to assess the wear experience of people who have astigmatism when wearing a daily disposable contact lens for astigmatism over long days of wear.
- Trial name
- NCT07303920
- Testing
- Daily disposable contact lenses for astigmatism
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Ohio State University
Astigmatism, Myopia
Evaluation of Two Monthly Silicone Hydrogel Multifocal Toric in Soft Contact Lens Wearers
To compare the performance of two leading soft multifocal Toric contact lenses.
- Trial name
- NCT07829419
- Testing
- Lens A ( comfilcon A), Lens B ( lehfilcon A)
- Where
- 3 sites in United States
- Volunteers
- 60 people
- Sponsor
- CooperVision International Limited (CVIL)
Astigmatism, Myopia
Effect of a Myopia Control Lens on the Astigmatism in Children
The goal of this clinical trial is to investigate over a one-year period the effect of myopia control spectacle lenses on astigmatism in children aged 6 to 13 years with myopia and astigmatism.
- Trial name
- MAC (NCT07810725)
- Testing
- Lenslet-based myopia control spectacle lens
- Volunteers
- 15 people
- Sponsor
- Essilor International
Astigmatism, Myopia
Evaluation of Mesopic Visual Acuity and Patient Satisfaction Following Ray-Tracing-Guided LASIK
To provide comprehensive evaluation of WaveLight® Plus technology by assessing impact on both functional low-light vision and patient reported outcomes
- Trial name
- NCT07790185
- Testing
- Wavelight Plus
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Vance Thompson Vision
Myopia, Astigmatism
Study of a Phakic Implantable Collamer Lens (ICL)
A prospective, open-labeled, single-site study of a phakic implantable collamer lens (ICL) for the correction/reduction of myopia with or without astigmatism.
- Trial name
- NCT07790965
- Testing
- Phakic Implantable Collamer Lens (ICL)
- Volunteers
- 10 people
- Sponsor
- Staar Surgical Company
Myopia, Astigmatism
Study of an Implantable Collamer Lens (ICL)
A prospective, open-labeled, single-site study of an implantable collamer lens (ICL) for the correction/reduction of myopia with or without astigmatism.
- Trial name
- NCT07791381
- Testing
- Implantable collamer lens (ICL)
- Volunteers
- 10 people
- Sponsor
- Staar Surgical Company
Myopia, Astigmatism
SMILE Surgery in One Eye Compared to Ray Tracing-guided LASIK Surgery in the Fellow Eye
Participants will undergo LASIK surgery in one eye using ray tracing guided technology in one eye and LASIK surgery in the other eye using wavefront guided technology.
- Trial name
- NCT07721714
- Testing
- Ray tracing guided LASIK surgery
- Where
- United States
- Volunteers
- 62 people
- Sponsor
- Stanford University
Astigmatism, Cornea
Accuracy of Corneal Astigmatism in Different Region Modes
To analyze the difference between measured total corneal astigmatism and actual corneal astigmatism under different region modes and optimize the region setting.
- Trial name
- NCT03299530
- Testing
- patients with corneal astigmatism
- Where
- China
- Volunteers
- 70 people
- Sponsor
- Wenzhou Medical University
Pseudoexfoliation Syndrome, Cataract
Corneal Biomechanics and Surgically Induced Astigmatism in Pseudoexfoliation Syndrome
This prospective study aims to evaluate the influence of corneal biomechanical properties on surgically induced astigmatism following standard phacoemulsification cataract surgery in patients with pseudoexfoliation syndrome…
- Conditions
- Pseudoexfoliation Syndrome, Cataract, Astigmatism
- Trial name
- NCT07722247
- Testing
- phacoemulsification cataract surgery
- Where
- Croatia
- Volunteers
- 70 people
- Sponsor
- Kata Culina
Cataract With Pre-existing Regular Corneal Astigmatism
Influence of Implantation Technique on Rotational Stability of a Frosted-Haptic Toric Intraocular Lens: A Prospective Contralateral-Eye Study
This prospective, randomized contralateral-eye study evaluates whether the implantation technique influences the rotational stability and refractive outcomes of the TECNIS Eyhance™ Toric II intraocular lens (IOL) during cataract…
- Trial name
- NCT07768722
- Testing
- OVD-assisted Implantation, BSS-assisted hydroimplantation
- Where
- Egypt
- Volunteers
- 80 people
- Sponsor
- Ain Shams University
Hyperopia, High Astigmatism
Fresh Corneal Lenticule Implantation in Hyperopic Patients With High Astigmatism
The refractive combination of high hyperopia with high astigmatism is difficult to treat surgically. In addition, there are not many suitable options to offer such patients presenting with this condition.
- Trial name
- NCT04616144
- Testing
- Fresh Corneal Lenticule Implantation using Relex-Smile VisuMax Femtosecond Laser
- Where
- Kosovo
- Volunteers
- 55 people
- Sponsor
- Eye Hospital Pristina Kosovo
Irregular Astigmatism
Intrastromal Fresh Human Corneal Lenticule Implantation Using Smile Surgery for Treatment of Irregular Corneal Astigmatism After Penetrating Keratoplasty (New Approach)
The aim of the study is to present the effect of implanting intrastromal fresh corneal lenticule by SMILE surgery as a new method-approach to correct the corneal shape on purpose to reduce irregular astigmatism and increasing…
- Trial name
- NCT04987060
- Testing
- Intrastromal Fresh Human Lenticule Implantation
- Where
- Kosovo
- Volunteers
- 24 people
- Sponsor
- Eye Hospital Pristina Kosovo
Hyperopic Astigmatism
Effect of WRAD Lens on Axial Growth and Refraction in Low-hyperopic Chinese Children
Myopia is one of the most common visual impairments worldwide.This not only poses long-term risks to individual health but also imposes significant medical and economic burdens on society.
- Trial name
- NCT07682974
- Testing
- With-the-Rule Astigmatic Defocus Lens, With-the-Rule Astigmatic Defocus Lens (Non-plano), Single Vision
- Volunteers
- 117 people, healthy volunteers welcome
- Sponsor
- He Eye Hospital
Myopia, Astigmatism
KLEx Versus FS-LASIK for the Treatment of Myopia and Compound Myopic Astigmatism
FemtoLASIK is a type of laser eye surgery used to correct vision problems such as nearsightedness, farsightedness, and astigmatism. It involves two main steps: creating a flap and reshaping the cornea.
- Conditions
- Myopia, Astigmatism, Myopic Astigmatism
- Trial name
- NCT06477081
- Testing
- FS-LASIK procedure, KLEx
- Where
- Mexico
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Instituto de Oftalmología Fundación Conde de Valenciana
Dry Eye, Cataract
Effect of Dry Eye Treatment on Corneal Astigmatism Measurements
This prospective single-center study evaluates the effect of dry eye disease and short-term ocular surface treatment on the agreement and repeatability of corneal astigmatism measurements in patients with age-related cataract.
- Trial name
- NCT07657858
- Testing
- Sodium Hyaluronate Eye Drops
- Where
- China
- Volunteers
- 400 people
- Sponsor
- Jin Yang
Myopia, Hyperopia
Corneal Epithelial Thickness Mapping by Anterior Segment Optical Coherence Tomography in Patients With Refractive Errors
This study evaluates corneal epithelial thickness using anterior segment optical coherence tomography (AS-OCT) in patients with refractive errors.
- Conditions
- Myopia, Hyperopia, Astigmatism, Emmetropia
- Trial name
- NCT07647146
- Where
- Egypt
- Volunteers
- 360 people, healthy volunteers welcome
- Sponsor
- Sohag University
Aphakia, Astigmatism
Clareon TruPlus Study
The purpose of this research study is to generate safety and performance data for Clareon TruPlus Monofocal Intraocular Lenses (IOLs).
- Trial name
- NCT07502456
- Testing
- Clareon TruPlus Monofocal Non-Toric IOL, Clareon TruPlus Monofocal Toric IOL, Phacoemulsification
- Where
- 5 sites in United States
- Volunteers
- 122 people
- Sponsor
- Alcon Research
Astigmatism
Nomogram for Astigmatism Correction of KLEx
The goal of this clinical trial is to learn if nomogram could promote treatment outcomes in astigmatism correction. The main question it aims to answer is: does the nomogram could promote treatment outcomes in astigmatism…
- Trial name
- NCT07605221
- Testing
- nomogram
- Where
- China
- Volunteers
- 100 people
- Sponsor
- Tianjin Eye Hospital