Clinical trials: Astigmatism, open to volunteers
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)
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
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
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
Ophthalmology
Optimizing the Ocular Surface With Systane COMPLETE Pre- and Post-operatively in Patients With Dry Eye Planning for Cataract Surgery: An Extension Study of Optimizing the Ocular Surface With Systane COMPLETE in Patients With Dry Eye Planning for Cataract Surgery
Compare the corneal astigmatism data before and after the use of Systane COMPLETE to evaluate its impact on predicting changes in postoperative residual astigmatism, as well as the effects of using or not using Systane COMPLETE…
- Trial name
- NCT06886373
- Testing
- Systane Complete
- Where
- Taiwan
- Volunteers
- 140 people
- Sponsor
- National Taiwan University Hospital
Cataract
Postoperative Rotational Dynamics of Three Toric Intraocular Lens Designs
This prospective comparative cohort study evaluates and compares postoperative rotational stability and time-course dynamics of three commercially available toric intraocular lenses (TECNIS Toric II [ZCU], AcrySof IQ Toric, and…
- Trial name
- 3 TORIC ROTATE (NCT07453992)
- Testing
- TECNIS Toric II (ZCU), AcrySof IQ Toric, AT TORBI 709M
- Where
- China
- Volunteers
- 400 people
- Sponsor
- Jin Yang
Myopic Astigmatism
A Study to Investigate the Safety and Effectiveness of the Technolas® TENEO 317 Model 2 Excimer Laser for Laser In Situ Keratomileusis (LASIK) Surgery to Treat Myopia or Myopic Astigmatism
This will be a multicenter, prospective, open label, non-randomized, single arm study evaluating the safety and effectiveness of the Technolas® TENEO 317 Model 2 (version 1.28 US software) Excimer Laser when used in LASIK surgery…
- Trial name
- NCT07377474
- Testing
- TENEO 317 Model 2 (1.28 US) Excimer Laser
- Volunteers
- 32 people
- Sponsor
- Bausch & Lomb Incorporated
Irregular Astigmatism, Astigmatism
Improving Visual Quality in Patients With Irregular Corneas Using Asymmetrical Toric Intraocular Lenses
Cataract surgery in patients with irregular corneas presents unique challenges, primarily due to the high variability in keratometry and corneal tomography measurements, which complicates accurate intraocular lens (IOL)…
- Conditions
- Irregular Astigmatism, Astigmatism, Cataract and IOL Surgery
- Trial name
- VITAL (NCT07294716)
- Testing
- AMILens Individual
- Where
- Austria
- Volunteers
- 15 people
- Sponsor
- Johannes Kepler University of Linz
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