Astigmatism: all 420 studies
Page 1 of 5. Open to participants first (54), then studies with results posted, then the rest; newest registration first within each.
- Evaluation of Two Monthly Silicone Hydrogel Multifocal Toric in Soft Contact Lens WearersNot yet recruitingNCT07829419Not applicable
- Effect of a Myopia Control Lens on the Astigmatism in ChildrenNot yet recruitingNCT07810725Not applicable
- Study of an Implantable Collamer Lens (ICL)Not yet recruitingNCT07791381Not applicable
- Study of a Phakic Implantable Collamer Lens (ICL)Not yet recruitingNCT07790965Not applicable
- Evaluation of Mesopic Visual Acuity and Patient Satisfaction Following Ray-Tracing-Guided LASIKRecruitingNCT07790185Phase 4
- Evaluation of Orthokeratology Lenses With a 5MM Optic Zone DiameterRecruitingNCT07751172Not applicable
- Corneal Biomechanics and Surgically Induced Astigmatism in Pseudoexfoliation SyndromeRecruitingNCT07722247
- SMILE Surgery in One Eye Compared to Ray Tracing-guided LASIK Surgery in the Fellow EyeRecruitingNCT07721714Phase 4
- Effect of WRAD Lens on Axial Growth and Refraction in Low-hyperopic Chinese ChildrenNot yet recruitingNCT07682974Not applicable
- Effect of Dry Eye Treatment on Corneal Astigmatism MeasurementsRecruitingNCT07657858Not applicable
- Corneal Epithelial Thickness Mapping by Anterior Segment Optical Coherence Tomography in Patients With Refractive ErrorsNot yet recruitingNCT07647146
- Nomogram for Astigmatism Correction of KLExRecruitingNCT07605221Not applicable
- Clareon TruPlus StudyRecruitingNCT07502456Not applicable
- Postoperative Rotational Dynamics of Three Toric Intraocular Lens DesignsRecruitingNCT07453992Not applicable
- 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 AstigmatismNot yet recruitingNCT07377474Not applicable
- Wear Experience With Daily Disposable Contact Lenses for Astigmatism Over a Long-Wear DayRecruitingNCT07303920Not applicable
- Improving Visual Quality in Patients With Irregular Corneas Using Asymmetrical Toric Intraocular LensesRecruitingNCT07294716Not applicable
- Assessing the Turkish DDIVAT for Visual Acuity MeasurementNot yet recruitingNCT07240480
- A Planned Study at Multiple Sites is Being Done to Compare the Results of Two Types of Trifocal Toric Intraocular Lenses Used in Cataract SurgeryRecruitingNCT07232615Not applicable
- A Three-Phase Contralateral Comparison of Ray-Tracing Guided LASIK Versus Three Other Refractive Surgery Platforms to Correct Myopia or Myopia With AstigmatismRecruitingNCT07201298Not applicable
- Comparison Of Keratometric Readings Pre and Post Pterygium Excision With Conjunctival Autograft TransplantationEnrolling by invitationNCT07198126Not applicable
- Performance of Large Language Models for Structured Recognition and Refractive PredictionRecruitingNCT07183891
- Arcuate Incisions With Light Adjustable Lens for Astigmatism Correction in Lens SurgeryRecruitingNCT07140653Phase 4
- Clinical Evaluation of WaveLight Plus LASIKRecruitingNCT07127757
- Effectiveness, Stability and Influence Factors of Femtosecond Laser Assisted Cataract SurgeryRecruitingNCT07081919
- Wavefront-guided LASIK Surgery Compared to Ray Tracing-Guided LASIK SurgeryRecruitingNCT07078799Not applicable
- A Clinical Trial Assessing the Safety and Effectiveness of Orthokeratology Lenses in Patients With Myopia and Myopic AstigmatismNot yet recruitingNCT07047924Not applicable
- Algorithm-assisted Subjective Refraction Program Dedicated to ChildrenRecruitingNCT07046065Not applicable
- Observational Study - TA- 2025-1Enrolling by invitationNCT07007897
- North American Comfilcon A Clinical StudyRecruitingNCT06902584
- Effectiveness and Safety of Limbal Relaxing Incisions for Correcting Post Phacoemulsification High AstigmatismNot yet recruitingNCT06896357Phase 1
- 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 SurgeryRecruitingNCT06886373Phase 4
- The Objective of This Study is to Evaluate the Perfomance of a Photorefraction Device for Screening Ametropia in Children. Eligible Participants Will Undergo Multiple Refractive Error Measurements, Visual Acuity and Strabismus Assessments During a Single Evaluation Visit.RecruitingNCT06882408Not applicable
- A Prospective, Randomized Clinical Study of Two Phakic Toric Implantable LensesRecruitingNCT06839898Not applicable
- Enhancing Scleral Lens Fit With Advanced ImagingEnrolling by invitationNCT06751615
- Anterior Segment and Corneal Parameters in Keratoconus and High Myopic Astigmatism Using Schiempflug ImagingNot yet recruitingNCT06739018
- Application of Phototherapeutic Keratectomy Mode to Mark the Axis of AstigmatismRecruitingNCT06694051Not applicable
- Effectiveness and Safety of the TENEO 317 Model 2 Excimer Laser to Treat Myopia With or Without Astigmatism by Transepithelial Photorefractive KeratectomyNot yet recruitingNCT06618547Not applicable
- A Prospective Clinical Investigation to Evaluate the Safety and Performance of 877PTY Toric IOL for Visual Correction of Corneal AstigmatismEnrolling by invitationNCT06578884
- A Study of Artificial Intelligence Assisted Small Incision Lenticule Extraction (SMILE) for Surgical Design and Influencing FactorsRecruitingNCT06229301
- Femtosecond Laser Arcuate Keratotomy Versus Toric Intraocular Lens Implantation in Cataract SurgeryRecruitingNCT06215807Not applicable
- Changes in Angle Kappa and Corneal Back Elevations After Laser in Situ Keratomileusis in Myopic AstigmatismNot yet recruitingNCT06166212
- Total Corneal Astigmatism Prevalence in Cataract PatientsNot yet recruitingNCT06148857
- Evaluation of Different Lenticule Diameters in Myopic Astigmatism Correction With SMILE ProceduresRecruitingNCT06062004Not applicable
- Software Refraction With Mobilerone Versus RetinoscopyRecruitingNCT06059521Not applicable
- EyeQue VisionCheck 510(k) Clinical TrialNot yet recruitingNCT06044688Not applicable
- Using the VisuMax Femtosecond Laser System to Perform SMILE Optimized for Presbyopia by Modulation of Postoperative Spherical AberrationEnrolling by invitationNCT05684237Not applicable
- Correlation Between Preoperative Refraction and Anterior Segment Parameters With ICL VaultEnrolling by invitationNCT05670626Not applicable
- Vision and Balance Changes After Bilateral Implantation of Toric IOLsRecruitingNCT05629078Not applicable
- Prospective Multicenter Clinical Study on the Visual and Refractive Outcomes and Safety Outcomes Following Implantation of an AddOn Intraocular Lens in Previously Pseudophakic EyesRecruitingNCT05596682
- Dresden Corneal Disease and Treatment StudyRecruitingNCT04251143
- Rotation of Hydrophobic Acrylic Lenses - Rayner RA0800C & Alcon Clareon & Hoya Nanex & Hoya Vivinex XY1-EM & RayOne EMV Toric & PODEYE ToricRecruitingNCT03803852Not applicable
- Accuracy of Corneal Astigmatism in Different Region ModesRecruitingNCT03299530
- An Evaluation of LASIK, SMILE and PRK Surgery in PhysiciansRecruitingNCT02576483
- Evaluation of Daily Disposable Toric Soft Lenses Manufactured With an Alternative Hydration ProcessCompletedNCT06967129Not applicableResults posted
- Visual Performance With Clareon® Vivity® Intraocular Lenses (IOLs)CompletedNCT06784063Not applicableResults posted
- A Clinical Comparison of Two Soft Toric Contact LensesCompletedNCT06758089Not applicableResults posted
- Evaluation of Delefilcon A and Senofilcon A Daily Disposable Toric Soft Contact Lenses Over One Week of WearCompletedNCT06749496Not applicableResults posted
- Clinical Evaluation of Two Toric Soft Contact LensesCompletedNCT06490302Not applicableResults posted
- Clinical Performance Evaluation of Two Frequent Replacement Silicone Hydrogel Multifocal Toric Contact LensesCompletedNCT06461455Not applicableResults posted
- A Clinical Comparison of Two Multifocal Toric Soft Contact LensesCompletedNCT06438601Not applicableResults posted
- Clinical Evaluation of Proclear Toric and Biofinity ToricCompletedNCT06431061Not applicableResults posted
- Investigation of the Safety and Effectiveness of Monofocal Toric Intraocular Lens (IOL)CompletedNCT06399211Results posted
- Safety and Suitability of ICL for Correction of Refractive Errors Without the Use of Dispersive OVDsCompletedNCT06371079Results posted
- Evaluation of Long-term Safety and Performance of PanOptix Trifocal Intraocular Lens (IOL)CompletedNCT06166901Not applicableResults posted
- Comparison of Clinical Performance of Two Monthly Replacement Toric Soft Contact LensesCompletedNCT06165627Not applicableResults posted
- Kalifilcon A Toric Compared to Commercially Available LensesCompletedNCT06098937Not applicableResults posted
- Orientation Characteristics of Daily Disposable Toric Contact LensesCompletedNCT06069609Not applicableResults posted
- 1-Week Dispensing Evaluation of REVIVE™ Toric Soft Contact LensesCompletedNCT06053736Not applicableResults posted
- Clinical Trial of a Hydrophilic EMV Toric Lens RAO210T in the Correction of Aphakia and Corneal AstigmatismCompletedNCT05985304Not applicableResults posted
- Clinical Performance Evaluation of Two Frequent Replacement Silicone Hydrogel Toric Contact LensesCompletedNCT05959200Not applicableResults posted
- Subjective Wearing Experience of the Total30 for Astigmatism Lens Among Satisfied Biofinity Toric Lens WearersCompletedNCT05938010Results posted
- Performance Evaluation of Two Silicone Hydrogel Toric Lens Designs in Habitual Soft Contact Lens WearersCompletedNCT05933772Not applicableResults posted
- Assessing the Clinical Performance of Two Frequent Replacement Silicone Hydrogel Multifocal Toric Contact LensesCompletedNCT05886907Not applicableResults posted
- Success of Dailies Total1 for Astigmatism Contact Lenses in Patients That Have Previously Failed With Toric Contact LensesCompletedNCT05886452Results posted
- Clinical Evaluation of Hydrogel and Silicone Hydrogel Daily Disposable Toric Contact LensesCompletedNCT05805085Not applicableResults posted
- Evaluation of ACUVUE® OASYS 1-Day for Astigmatism Contact Lenses With Alternative LidstockCompletedNCT05713552Not applicableResults posted
- Clinical Evaluation of Two Toric Contact LensesCompletedNCT05688657Not applicableResults posted
- A Clinical Performance of Two Soft Toric Contact LensesCompletedNCT05633082Not applicableResults posted
- Evaluation of Wear Experience With Daily Disposable and Monthly Replacement Toric Contact LensesCompletedNCT05580575Not applicableResults posted
- Post-Market Evaluation of the EVO ICLCompletedNCT05538754Not applicableResults posted
- Performance of Dailies Total1® Contact Lenses for Astigmatism in Symptomatic Habitual Reusable Toric Lens WearersCompletedNCT05498649Results posted
- Clinical Comparison of Two Daily Disposable Toric Soft Contact LensesCompletedNCT05483127Not applicableResults posted
- Tolerance to Residual Astigmatism in Eyes With Vivity®CompletedNCT05392998Results posted
- 1-Week Dispensing Evaluation of Kalifilcon A Toric Contact Lenses Compared to Ultra for AstigmatismCompletedNCT05320042Not applicableResults posted
- LFR-260 vs Traditional Phoropter in Visual Acuity TestingCompletedNCT05259163Not applicableResults posted
- Clinical Assessment of a Daily Wear Monthly Replacement Silicone Hydrogel Toric Contact LensCompletedNCT05211739Not applicableResults posted
- Insertion Clinical Study to Evaluate the Orientation Characteristics of Multiple Kalifilcon A Daily Disposable Toric LD213001 Contact LensesCompletedNCT05129124Not applicableResults posted
- Performance of Toric Silicone Hydrogel Contact LensesCompletedNCT05097144Not applicableResults posted
- Retrospective Chart Review of enVista Toric 0.9D Intraocular LensesCompletedNCT05075746Results posted
- The Comparative Clinical Performance of Two Daily Disposable Toric Contact LensesCompletedNCT05020990Not applicableResults posted
- Clinical Performance of Two Daily Disposable Toric Soft Contact LensesCompletedNCT04908488Not applicableResults posted
- Wear Experience With Daily Toric Contact Lenses Over a Long DayCompletedNCT04844281Not applicableResults posted
- Performance Evaluation of Two Daily Disposable Toric Lens Designs in Habitual Soft Contact Lens WearersCompletedNCT04831515Not applicableResults posted
- Clinical Investigation of the WaveLight® EX500 Excimer LaserCompletedNCT04805593Not applicableResults posted
- Evaluation of ACUVUE OASYS® 1-Day for Astigmatism Lenses Produced on a New Manufacturing LineCompletedNCT04794270Not applicableResults posted
- Toric Contact Lens Digital Performance and Comfort StudyCompletedNCT04772560Not applicableResults posted
- Femtosecond Laser Assisted Keratotomies for the Management of Corneal AstigmatismCompletedNCT04676451Not applicableResults posted
- Quantification of the Visual Benefits of Soft Toric Contact Lenses Compared to Soft Spherical Contact LensesCompletedNCT04613882Not applicableResults posted
- Clinical Investigation of an AcrySof IQ PanOptix Toric Intraocular LensCompletedNCT04542525Not applicableResults posted