Clinical trials: Astigmatism
Cataract, Astigmatism
Toric Intraocular Lens Following Cataract Surgery
The objective of this clinical trial is to evaluate the safety and effectiveness of the Bausch + Lomb Toric Accommodating Posterior Chamber Silicone Intraocular Lens used to provide near, intermediate, and distance vision and a…
- Trial name
- NCT01140477
- Testing
- Toric Accommodating Lens, Accommodating Lens
- Where
- United States
- Volunteers
- 229 people
- Sponsor
- Bausch & Lomb Incorporated
Astigmatism
Toric Contact Lens Digital Performance and Comfort Study
This study seeks to quantify digital visual performance and subjective visual acceptance of toric contact lenses as compared to spherical lenses in low to moderate astigmatic patients.
- Trial name
- NCT04772560
- Testing
- Precision1 for Astigmatism, Precision1 Sphere
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Kathryn Richdale
Visual Acuity, Astigmatism
LFR-260 vs Traditional Phoropter in Visual Acuity Testing
The purpose of this study is to establish if LFR-260 (investigational device) is not inferior in effectiveness to a traditional phoropter (control device) when applied in visual acuity test in subjects undergoing a full routine…
- Conditions
- Visual Acuity, Astigmatism, Anisometropia
- Trial name
- NCT05259163
- Testing
- LFR-260 portable phoropter, Traditional phoropter (SOC)
- Where
- 2 sites in United States
- Volunteers
- 112 people, healthy volunteers welcome
- Sponsor
- Evolution Optiks Limited
Refractive Errors, Astigmatism
Study of a Hand-held Device Plus Mobile App Versus Standard Eye Care Devices in Measuring Refractive Error of the Eye
Single-center, open-label, prospective study in healthy volunteers desiring refraction for correction of visual acuity to compare a handheld device supported by a mobile application with the phoropter and autorefractor.
- Trial name
- NCT03929588
- Testing
- Hand-held device supported by a mobile application, Phoropter, Autorefractor
- Where
- United States
- Volunteers
- 230 people, healthy volunteers welcome
- Sponsor
- EyeQue Corp.
Astigmatism
Visual Performance With Clareon® Vivity® Intraocular Lenses (IOLs)
The purpose of this study is to generate clinical data to quantify the impact of residual astigmatism on the overall visual performance during distance, intermediate, and near viewing in patients implanted with Clareon Vivity…
- Trial name
- NCT06784063
- Testing
- Clareon Vivity Extended Vision IOL
- Where
- 3 sites in United States
- Volunteers
- 40 people
- Sponsor
- Alcon Research
Myopia, Myopic Astigmatism
Multicenter Clinical Trial of a Phakic Implantable Collamer® Lens (ICL)
This objective of this study is to evaluate the safety, and to collect supportive data on effectiveness of the EVO/EVO+ Visian® Implantable Collamer® Lens (ICL) in study participants who have a diagnosis of myopia or myopia with…
- Trial name
- NCT04283149
- Testing
- EVO/EVO+ Visian ICL
- Where
- 14 sites in United States
- Volunteers
- 327 people
- Sponsor
- Staar Surgical Company
Astigmatism
Refitting Somofilcon A Toric Contact Lens Wearers Into Fanfilcon A Toric Lenses for 4-weeks of Wear
The aim of this prospective study is to evaluate the clinical performance of habitual wearers of Clariti Toric lenses after a refit with Avaira Vitality Toric lenses for 1-month of daily wear.
- Trial name
- NCT04050605
- Testing
- somofilcon A toric contact lens, fanfilcon A toric contact lens
- Where
- Mexico
- Volunteers
- 40 people
- Sponsor
- CooperVision, Inc.
Astigmatism
Clinical Evaluation of Two Toric Contact Lenses
The study objective was to compare short-term clinical performance data of two toric contact lenses.
- Trial name
- NCT05688657
- Testing
- Lens A, Lens B
- Where
- Mexico
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Astigmatism, Cataract
Femtosecond Laser Assisted Keratotomies for the Management of Corneal Astigmatism
A cataract is a clouding of the lens that occurs naturally with age. Cataract surgery involves removal of the cloudy lens and replacement with an artificial one.
- Trial name
- NCT04676451
- Testing
- Femto-AK
- Where
- United States
- Volunteers
- 94 people
- Sponsor
- Milton S. Hershey Medical Center
Myopia, Myopic Astigmatism
A Study With Technolas® TENEO 317 Model 2 Excimer Laser to Treat Participants With Myopia or Myopic Astigmatism
The primary objective of this study is to collect safety and effectiveness data for the Technolas Teneo 317 Model 2 excimer laser for LASIK correction in participants with myopia and myopic astigmatism.
- Trial name
- NCT04111757
- Testing
- Technolas® TENEO 317 Model 2
- Where
- 10 sites in United States
- Volunteers
- 168 people
- Sponsor
- Bausch & Lomb Incorporated
Myopia, Myopic Astigmatism
Post-Market Evaluation of the EVO ICL
The objective of this study is to assess the rate of early intraocular pressure (IOP) increases following implantation of EVO/EVO+ Implantable Collamer Lens (ICL).
- Trial name
- NCT05538754
- Testing
- EVO ICL
- Where
- 8 sites in United States
- Volunteers
- 205 people
- Sponsor
- Staar Surgical Company
Hyperopia, Astigmatism
A Study to Evaluate the Safety and Effectiveness of the Technols 217z Zyoptix System for Hyperopia
A study to demonstrate the safety and effectiveness of wavefront laser refractive surgery treatments for hyperopia and astigmatism.
- Trial name
- NCT00348205
- Testing
- Technolas 217z Zyoptix Laser
- Where
- United States
- Volunteers
- 80 people
- Sponsor
- Bausch & Lomb Incorporated
Hyperopia, Hyperopic Astigmatism
Clinical Investigation of the WaveLight® EX500 Excimer Laser
The purpose of this study is to collect efficacy and safety data on the WaveLight EX500 excimer laser system for the correction of hyperopia with and without astigmatism by laser in situ keratomileusis (LASIK) treatment.
- Trial name
- NCT04805593
- Testing
- WaveLight EX500 excimer laser system, LASIK
- Where
- 5 sites in United States
- Volunteers
- 44 people
- Sponsor
- Alcon Research
Astigmatism
Evaluation of Delefilcon A and Senofilcon A Daily Disposable Toric Soft Contact Lenses Over One Week of Wear
This is a prospective, multi-site, 4-visit, bilateral, dispensing, randomized, controlled, double-masked, 2x2 crossover study to evaluate subjective comfort, overall opinion and end of day comfort following wear of two different…
- Trial name
- NCT06749496
- Testing
- Test Lens, Control Lens
- Where
- 12 sites in United States
- Volunteers
- 134 people, healthy volunteers welcome
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Astigmatism, Myopia
Effect of Head and Gaze Position on Soft Toric Contact Lens Performance
Primary Hypotheses: Senofilcon A will provide significantly less rotation with subjects in a recumbent position than Filcon II 3 monthly .
- Trial name
- NCT01579045
- Testing
- senofilcon A, etafilcon A, nelfilcon A
- Where
- United Kingdom
- Volunteers
- 24 people
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Cataract, Presbyopia
Retrospective / Prospective Clinical Study of AcrySof® IQ ReSTOR® +2.5 D Multifocal Toric Intraocular Lenses
The purpose of this study is to characterize the safety and effectiveness of the ACRYSOF IQ ReSTOR +2.5 diopter (D) Multifocal Toric Intraocular Lens (IOL) in subjects at least 3 months and no more than 14 months after IOL…
- Conditions
- Cataract, Presbyopia, Corneal Astigmatism
- Trial name
- NCT02176343
- Testing
- AcrySof® IQ ReSTOR® +2.5 D Multifocal Toric IOL
- Volunteers
- 37 people
- Sponsor
- Alcon Research
Astigmatism
Performance Evaluation of Two Silicone Hydrogel Toric Lens Designs in Habitual Soft Contact Lens Wearers
The objective of the study was to compare the clinical performance of two monthly toric silicone hydrogel contact lenses in habitual wearers, when worn for 1-month each.
- Trial name
- NCT05933772
- Testing
- Lens A (comfilcon A toric lens), Lens B (lehfilcon A toric lens)
- Where
- 5 sites in United States, Canada
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- CooperVision International Limited (CVIL)
Myopia, Astigmatism
Contralateral Comparison of Three Excimer Laser Systems in Performing LASIK
The purpose of this study is to compare LASIK outcomes using the WaveLight ALLEGRETTO WAVE™ wavefront guided or optimized excimer laser treatment with the AMO/VISX CustomVue™ and the LADARVision 4000 excimer laser treatment.
- Trial name
- WLCVLV-001 (NCT00821236)
- Testing
- Excimer Laser, AMO/VISX CustomVue™, LADARVision 4000 excimer laser
- Where
- 2 sites in United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Durrie Vision
Astigmatism
Hydrophobic Acrylic Toric IOL Designed to Reduce the Effects of Preoperative Corneal Astigmatism
The investigational enVista IOL, Model MX60Tis equipped with toric optics and axis marks on the posterior surface to minimize the possibility of surgically induced astigmatism.
- Trial name
- NCT01852084
- Testing
- enVista® One-Piece Hydrophobic Acrylic Toric IOL, enVista control lens
- Where
- United States
- Volunteers
- 191 people
- Sponsor
- Bausch & Lomb Incorporated
Cataracts
AcrySof® IQ ReSTOR® +3.0 D Multifocal Toric Intraocular Lens (IOL) Clinical Study in Japan
The purpose of this study is to evaluate safety and effectiveness of AcrySof® IQ ReSTOR® +3.0 D Multifocal Toric IOL Models SND1T3, SND1T4, SND1T5, and SND1T6 when implanted to replace the natural lens in Japanese cataract…
- Trial name
- NCT01323777
- Testing
- AcrySof® IQ ReSTOR® +3.0 D Multifocal Toric IOL
- Where
- 2 sites in Japan
- Volunteers
- 65 people
- Sponsor
- Alcon Research