Refractive Errors: all 427 studies
Page 3 of 5. Open to participants first (62), then studies with results posted, then the rest; newest registration first within each.
- Clinical Evaluation of Two Daily Disposable Contact LensesCompletedNCT01163760Not applicableResults posted
- Performance and Acceptability of VSS-RCompletedNCT01067716Not applicableResults posted
- Clinical Comparison of Two Silicone-Hydrogel Contact LensesCompletedNCT00762385Not applicableResults posted
- Evaluation of Disinfecting Solutions and Protein Remover With a Silicone Hydrogel LensCompletedNCT00754338Not applicableResults posted
- Evaluation of Deposits on Contact Lenses Worn Daily WearCompletedNCT00725153Not applicableResults posted
- A Comparison of Two Daily Disposable Contact Lenses.CompletedNCT00721500Not applicableResults posted
- Clinical Performance of a New Daily Disposable Contact Lens Worn in an Established Contact Lens Wearing PopulationCompletedNCT00708643Not applicableResults posted
- Clinical Performance of a New Daily Disposable Contact Lens Worn in a Neophyte Population.CompletedNCT00708032Not applicableResults posted
- A Comparison of Two Contact LensesCompletedNCT00700752Not applicableResults posted
- Safety and Acceptability of Using a Rewetting Drop With Contact Lens WearCompletedNCT00691197Phase 2/3Results posted
- Comparison of Two Toric Contact Lenses on Current Toric WearersCompletedNCT00639379Not applicableResults posted
- A Comparison of Two Daily Disposable Contact LensesTerminatedNCT00634101Not applicableResults posted
- Endothelial Bleb Response With Toric LensesCompletedNCT00630305Not applicableResults posted
- Evaluation of the Performance of Non-molded Soft Contact LensesCompletedNCT00371787Phase 3Results posted
- Correction of Myopia Evaluation Trial 2CompletedNCT00320593Phase 3Results posted
- Keratoconus - Screening in Patients With Downs SyndromeCompletedNCT07800975
- Corneal Topography and High Order Aberrations in Regular Contraceptive PillsCompletedNCT07693673
- Advanced Technology for Myopia Control in Children and Young AdultsCompletedNCT07645183Not applicable
- Atropine Alone vs Atropine Plus Bifocal Spectacles for Myopia Control in ChildrenCompletedNCT07614113Not applicable
- Optimization for Toric Contact LensesCompletedNCT07557030Not applicable
- Machine Learning Prediction of 1-Year Refractive Error After SMILECompletedNCT07478419
- LED Low-Intensity Red Light for Myopia Control in Youth: Efficacy and Safety StudyCompletedNCT07375589Not applicable
- Peripheral Relative Refractive Power of Orthokeratology LensesCompletedNCT07294404
- Post Marketing Clinical Study on the Efficacy of Lenses From a New Prescription ProtocolCompletedNCT07168564Not applicable
- Clinical Investigation of Proclear® 1 Day and MyDay® Sphere Contact LensesCompletedNCT07104773Not applicable
- Clinical Investigation of a Femtosecond Laser for Corneal Flap CreationCompletedNCT07036835Not applicable
- Comparative Efficacy of Duochrome Test Verse +1 Blur Test in Detecting Refracting Error Across Different AgesActive, not recruitingNCT07001124Not applicable
- Comparative Study and Validation of New Methodologies for Measuring AdditionCompletedNCT06963138Not applicable
- Efficacy of PEEK Acuity Versus ETDRS Chart for Assessment of Visual Acuity and Refractive ErrorActive, not recruitingNCT06913491
- Investigation of the Accuracy of an Automated Refractor to Provide Well-tolerated Eyeglass PrescriptionsCompletedNCT06883032Not applicable
- Exploratory Study on the Effectiveness of Myopia Control Lenses in Slowing Myopia Progression in Young ChildrenActive, not recruitingNCT06857864Not applicable
- Efficacy and Visual Quality of Orthokeratology Lenses With Different DesignsCompletedNCT06825585Not applicable
- A Non-Treatment Clinical Evaluation of the ELITA Single Piece Patient Interface for Docking Procedure With the ELITACompletedNCT06727799
- A Clinical Trial to Evaluate the Vision Correction Safety and Efficacy of MSiHy Silicone Hydrogel Soft Contact LensCompletedNCT06716385Not applicable
- A Clinical Trial to Evaluate the Vision Correction Safety and Efficacy of DSiHy Silicone Hydrogel Soft Contact LensCompletedNCT06716372Not applicable
- Performance of Refractometers With Self-adjusting Lenses Compared to Cycloplegia in Children (REFRALENS)CompletedNCT06668246
- Comparative Analysis of the Visual Performance and Patient Satisfaction After Cataract Surgery With Implantation of a Medicontur Monofocal (877PAY) or a Medicontur Extended Depth of Focus (877PEY) IOLCompletedNCT06642779
- Frequency of Visual Impairment Among School Children and Effectiveness of mHealth Referral Reminder on Uptake of Referral ServicesCompletedNCT06616051Not applicable
- Optimization of a Photoretinoscopy Method for Determining the Objective Refraction of Children With a Smartphone/add-on Device in IndiaCompletedNCT06524115Not applicable
- Stellest Lens Wear in Adult Progressing MyopesActive, not recruitingNCT06520124Not applicable
- Post-market Clinical Follow-up Study of Alcon PRECISION1™ Spherical and PRECISION1™ for Astigmatism Soft Contact LensesTerminatedNCT06462456
- Effects of Power Ball on Proximal Muscle and Refractive Errors in Developmental Delay.CompletedNCT06461572Not applicable
- Visual Outcomes After Extended Depth of Focus Intraocular Lens Implantation With and Without Digital AssistanceCompletedNCT06460389
- Post-market Clinical Follow-up Study of Alcon TOTAL30® Contact Lenses (Lehfilcon A)TerminatedNCT06408649
- Correction of Refractive Error Surprises After Cataract Surgery in AdultsStatus unknownNCT06379477Not applicable
- Peripheral Defocus Profile of Multifocal Minus Contact LensesCompletedNCT06335212
- Optimization of a Photoretinoscopy Method for Determining the Objective Refraction of ChildrenCompletedNCT06295536Not applicable
- T30 for Astigmatism in Digital Device UsersCompletedNCT06266728Not applicable
- Clinical Investigation on Assessing the Repeatability and Reproducibility of Central and Peripheral Refractive ErrorCompletedNCT06209476
- Comparison of Efficacy Between Two Myopia Control LensesCompletedNCT06148870Not applicable
- Anxiety-related Fixation Instability During LASIKCompletedNCT06148428
- Eye Health Intervention Study in Upper ManhattanWithdrawnNCT06112431Not applicable
- Seeing to Learn in Sierra LeoneTerminatedNCT06065631Not applicable
- Total30 for Astigmatism Contact LensesCompletedNCT06052046Not applicable
- Contralateral Study of WaveLight® Femtosecond Laser Devices for Corneal Flap CreationCompletedNCT06021353Not applicable
- Air Optix® Night and Day® Aqua Continuous WearCompletedNCT05992675
- Air Optix® Night and Day® Aqua Daily WearCompletedNCT05976750
- Myopia Control With Three Lever Irradiance of PBM Therapy in Children and AdultsCompletedNCT05957458Not applicable
- Plasma Pharmacokinetics and Safety of LNZ101 and LNZ100 Ophthalmic Solutions in Healthy Adult Subjects With PresbyopiaCompletedNCT05936489Phase 1
- Air Optix Plus HydraGlyde Multifocal Daily/Extended Wear Contact LensesCompletedNCT05886894
- Air Optix Extended Wear Contact LensesCompletedNCT05886881
- Clinical Evaluation of a Myopia Control Lens in Slowing Myopia Progression (DAL)TerminatedNCT05840185Not applicable
- Pre-symptomatic Screening of Visual Acuity in Pre-school StudentsCompletedNCT05835193
- Air Optix Daily Wear Contact LensesCompletedNCT05827224
- Clinical Comparison of Toric Contact Lenses Fit CharacteristicsWithdrawnNCT05805345Not applicable
- Air Optix Night and Day Aqua (AONDA) Retrospective Study 1CompletedNCT05790928
- Prevalence of Refractive Errors in Primary School ChildrenStatus unknownNCT05781997
- Correlation of Angle Kappa , Corneal High Order Aberrations and Total Eye Aberrations in Various Refractive ErrorsStatus unknownNCT05741190
- Retrospective Clinical Investigation of the Safety and Performance of 640PM Trifocal IOL Implantation in Patients With Cataract and/or Ametropia (Hyperopia, Myopia) and/or PresbyopiaCompletedNCT05735990
- Light Emitting Diodes With a Continuous Spectrum of 430-780nm for Myopia PreventionActive, not recruitingNCT05728762Not applicable
- A PHASED, PROSPECTIVE, MULTI-CENTER STUDY OF THE ELITA SYSTEMTerminatedNCT05713253Not applicable
- The Effect of the Free-toroidal Design Lenses on the Subjective Visual Quality in the Myopic PopulationCompletedNCT05684302
- The Initiating Factors of Myopia Among Primary and Secondary School Students in TianjinStatus unknownNCT05637827
- Association Between ORA and Residual Refractive Astigmatism After SMILECompletedNCT05604872
- Effect of Repeated Low-Level Red-Light Therapy on Retinal Function and StructureCompletedNCT05597397Not applicable
- Access to EyeGlasses for School-aged ChildrenTerminatedNCT05588362Not applicable
- Visual Outcome of Vitrectomy After Refractive SurgeryStatus unknownNCT05583253Not applicable
- Repeated Low-Level Red-Light Therapy for Shortening Axial LengthActive, not recruitingNCT05550740Not applicable
- Clinical Evaluation of a Myopia Control Lens in Slowing Myopia Progression.CompletedNCT05534022Not applicable
- Comparison of Premium Monovision and Bilateral Implantation of Trifocal Diffractive Intraocular LensesCompletedNCT05494177
- Clinical Investigation of Refraction TechniquesCompletedNCT05461586
- Study on the Effect of Two Ways of Cycloplegia on Biological Parameters of Ciliary MuscleStatus unknownNCT05449015Phase 4
- Rapid Computerized Visual Acuity TestStatus unknownNCT05447845
- A Post-market Clinical Study to Collect Safety and Performance Data on Johnson & Johnson Surgical Vision ProductsCompletedNCT05394324
- Effect of Exogenous Growth Hormone on Ocular FindingsStatus unknownNCT05338411
- Clinical Evaluation of a Myopia Control Lens in Slowing Myopia ProgressionActive, not recruitingNCT05331378Not applicable
- Correction of Anisometropic Amblyopia in Children.Status unknownNCT05325021
- Age and Refraction in Predicting Myopia Progression in COVID-19CompletedNCT05305274
- Comparison of Visual Acuity Performed in Office Versus In ResidenceStatus unknownNCT05250986
- Assessment of Visual Acuity in Refugee PopulationCompletedNCT05209581
- Progressive Myopia Treatment Evaluation for NaturalVue Multifocal Contact Lens TrialActive, not recruitingNCT05159765Not applicable
- Refractive Error in Chinese StudentsStatus unknownNCT05119543
- Study to Evaluate the Reliability, Validity and Safety of Subjective Mobile RefractionStatus unknownNCT05049070Not applicable
- Clinical Comparison of 2 Daily Disposable Toric Soft Contact LensesCompletedNCT05039112Not applicable
- Efficacy and Safety of Astaxanthin in Volunteer With Refraction ErrorsStatus unknownNCT05009810Not applicable
- Clinical Performance of 59% Hioxifilcon A vs. Marketed Hydrogel Contact Lenses in Habitual Hydrogel WearersCompletedNCT04986644Not applicable
- Study in Pediatric Volunteers of a Handheld Device Versus a Standard Diagnostic Device in Ophthalmic RefractionStatus unknownNCT04955379Not applicable
- Refractive Disorders and Seric Vitamin D Level in Children With DisabilitiesCompletedNCT04827511
- Comparative Study in Measuring Anterior Chamber DepthStatus unknownNCT04816266
- Treatment of Residual Hypermetropic Refraction on Young Patients After LASIK Using Human Fresh Corneal Lenticule Implantation With ReLEX Smile SurgeryActive, not recruitingNCT04793893Not applicable