Refractive Errors: all 427 studies
Page 4 of 5. Open to participants first (62), then studies with results posted, then the rest; newest registration first within each.
- Refractive Outcomes After Cataract Surgery in Eyes With Pseudoexfoliation SyndromeCompletedNCT04783909
- A Web-based Digital Distance Visual Acuity TestStatus unknownNCT04756596
- The Effect of Early Glasses on the Development of AmblyopiaActive, not recruitingNCT04740593Not applicable
- Smart-TV Application for the Self Examination of the Distance Visual Acuity in Macular Edema PatientsStatus unknownNCT04739137
- Repeated Low-Level Red-Light Therapy and Orthokeratology in Fast-progressing Myopia ControlStatus unknownNCT04722874Not applicable
- Comparing Vision Tests in a Virtual Reality Headset to Existing AnaloguesCompletedNCT04714424
- Refractive Changes Following VitrectomyCompletedNCT04712786
- Panoptix Trifocal Lens in Post Refractive Myopic Laser Vision Correction SurgeryStatus unknownNCT04698278
- Safety and Efficacy of a New Transepithelial Photorefractive Keratectomy TreatmentCompletedNCT04698174Not applicable
- Handheld Device Compared With a Standard Eye Care Diagnostic Device in Measuring Ophthalmic RefractionStatus unknownNCT04693247Not applicable
- Femto-flap Versus SBK Flap,Predictability and VariabilityCompletedNCT04684888Not applicable
- Comparison of Anterior Corneal Optical Aberration Induced by CK and Hyperopic LASIKStatus unknownNCT04676620
- Comparative Clinical Performance of 59% Hioxifilcon A Contact Lenses vs. Marketed Hydrogel Contact LensesCompletedNCT04671108Not applicable
- Axis Length and Its Relationship With Refractive Error in Chinese University StudentsCompletedNCT04666870
- PiXL as a Treatment for Low Grade MyopiaActive, not recruitingNCT04663048Not applicable
- Prospective Study Evaluating Dry Eye in Patients Operated on for Ametropia by LASIK Surgery and Treated With REPADROPCompletedNCT04654455
- PROductivity Study of Presbyopia Elimination in Rural-dwellers IIICompletedNCT04654013Not applicable
- Clinical Trial With Artiflex Presbyopic (Artiplus)Active, not recruitingNCT04632784Not applicable
- PROductivity Study of Presbyopia Elimination in Rural-dwellers IICompletedNCT04629820Not applicable
- Premium Monovision Versus Other Types of Monovision and Bilateral Trifocal Implantation.CompletedNCT04618380
- Development and Validation of an Internet-based Near and Intermediate-vision Reading TestCompletedNCT04618224
- Safety and Efficacy of Different Add Powers With a New Presbyopic Lasik Treatment AlgorithmCompletedNCT04617080Not applicable
- Digital Wavefront SensingStatus unknownNCT04597255Not applicable
- Outcomes of a Trifocal IOL in Post-refractive PatientsStatus unknownNCT04545073
- Clinical Evaluation of HPT Treated Rigid Contact Lenses Made From Hexafocon AWithdrawnNCT04525170Not applicable
- Evaluation of Safety and Efficacy of Intrastromal Implantation of CorVision® Bioengineered Corneal Inlay for Correction of Presbyopia.Active, not recruitingNCT04465409Not applicable
- Trifocal Diffractive Intraocular Lens After Cataract Extraction With PhacoemulsificationCompletedNCT04465279Phase 2/3
- Longitudinal Changes in Refractive Error After Primary IOL Implantation Among Children With Congenital CataractCompletedNCT04441268
- Apioc Presbyopic Contact LensCompletedNCT04437732Not applicable
- Changes in Refractive Error in Patients With Both Partially Refractive Esotropia and AmblyopiaCompletedNCT04429659
- Customizing Myopia Control With Multifocal Toric Contact LensWithdrawnNCT04352868Not applicable
- Correlation Between Refraction and Biometric ParametersStatus unknownNCT04346251
- Academic Performance and Refractive ErrorStatus unknownNCT04338880
- Anesthetic Impregnated Bandage Soft Contact Lens (BSCL) in Pain Management After Photorefractive Keratectomy (PRK)Status unknownNCT04283331Phase 4
- Clinical Performance Evaluation of Two Daily Disposable Silicone Hydrogel Toric Contact LensesCompletedNCT04254003Not applicable
- Refractive Accuracy of "2WIN" and Portable AutorefractorsCompletedNCT04249505
- Comparison of Subjective Refraction Measurement With SiVIEW Software and by an ExpertCompletedNCT04185701Not applicable
- Environmental Health and Myopia Prevention and ControlStatus unknownNCT04161326
- A Comparative Study of TECNIS Symfony Plus IOL and a Trifocal IOLCompletedNCT04156737Not applicable
- Prevalence of Blindness, Visual Impairment in Chao Nan Area, ChinaCompletedNCT04143334
- Patients' Satisfaction After LASIKStatus unknownNCT04109040
- Correcting Myopia Among Secondary School Children to Increase Academic High School Attendance Rates in Rural CommunitiesActive, not recruitingNCT04077086Not applicable
- Efficacy of Repeated Low-Level Red-Light Therapy in Myopia ControlStatus unknownNCT04073238Not applicable
- Investigating the Effect of Using Myopia Prediction Algorithm on Myopia ChildrenStatus unknownNCT04044755Not applicable
- PAVES Benchmarking Pilot Study of Daily Disposable Contact LensesCompletedNCT04032457Not applicable
- Effect of Using Myopia Prediction AlgorithmStatus unknownNCT04005014Not applicable
- Photorefractive Intrastromal Corneal Crosslinking as a Treatment for Low Grade MyopiaCompletedNCT03987880Not applicable
- Perfecting Refraction in India With Superior Service ModelsCompletedNCT03983278Not applicable
- Clinical Evaluation of Acuity 200 (Fluoroxyfocon A) RGP Contact LensCompletedNCT03971227Not applicable
- Apioc Toric/Spherical Single Vision Contact LensCompletedNCT03970512Not applicable
- Clinical Performance of Two Daily Disposable Contact Lenses - Study 1CompletedNCT03969290Not applicable
- Choroidal Thickness Change in Response to Physiological and Refractive ChangesActive, not recruitingNCT03906279
- Chromatic and Monochromatic Optical Aberrations After Corneal Refractive SurgeryStatus unknownNCT03893838
- Apioc Contact Lens FeasibilityCompletedNCT03688672Not applicable
- Safety and Efficacy of a Sub-epitheilal Transform™ Corneal Allograft (TCA) for Presbyopia CorrectionWithdrawnNCT03675438Not applicable
- Trial of an Educational Intervention to Promote Spectacle Use Among Secondary School Children in Islamabad, PakistanCompletedNCT03670303Not applicable
- Performance of 2WIN Photoscreener With Corneal Reflex Compared to School Bus Retinoscopy by AAPOS GuidelinesCompletedNCT03668067
- PRO Measure for Refractive Surgery IRAS Project Number 246072CompletedNCT03655743
- Investigation of the Accuracy of a Low-cost, Portable, Autorefractor to Provide Well-tolerated Eyeglass PrescriptionsCompletedNCT03615612Not applicable
- Binocular Vision Anomalies After Cataract and Refractive SurgeryCompletedNCT03592615Not applicable
- Ocular Development and Refractive Error Changes Among Children and Adolescent - A Longitudinal StudyStatus unknownNCT03589937
- Evaluation of Progression of Myopia in Children Treated With Vitamin B2 and Outdoor Sunlight ExposureWithdrawnNCT03552016Phase 2
- Comparison of a Smartphone Based Self Refraction Tool With Conventional Refraction Error Estimation MethodsStatus unknownNCT03419351Not applicable
- Excimer Laser Surgery for Anisometropic AmblyopiaWithdrawnNCT03342235Not applicable
- Refractive Error and Biometry in Retinopathy of PrematurityCompletedNCT03334513
- The MORE Study: Manifest vs. Online Refraction EvaluationStatus unknownNCT03313921Not applicable
- Village-Integrated Eye Worker Trial II - PilotCompletedNCT03278587Not applicable
- Direct Comparison of SVOne Obtained Refraction to Subjective Manifest RefractionStatus unknownNCT03222661
- Early Feasibility Study of UV-Femtosecond Laser Assisted Lenticular ExtractionCompletedNCT03021707Not applicable
- Visual and Optics Impact of Refractive SurgeryCompletedNCT02889588
- International Multicenter Study on SMILE SurgeryStatus unknownNCT02844556Not applicable
- Study to Evaluate the Safety and Efficacy of HI-BRITE Large Diameter Rigid Gas Permeable Contact LensStatus unknownNCT02812316Not applicable
- Measurement Repeatability in Contemporary AberrometryStatus unknownNCT02687022Not applicable
- The Evolutionary Model of Mild-to-moderate Myopia in ChinaCompletedNCT02667509
- The Baltimore Reading and Eye Disease StudyCompletedNCT02607384Not applicable
- Clinical Evaluation of HPT Treated Rigid Contact Lenses Made From Roflufocon DCompletedNCT02553681Not applicable
- A Comparison of Two Devices for Measuring the Central Thickness of the Cornea Before and After Surgery (CECOT)CompletedNCT02522416
- Comparison of Corneal Stromal Tissue Consumption (LATAC)CompletedNCT02519673
- Dispensing Study to Assess the Visual Performance of Optimised Prototype Contact LensesCompletedNCT02484586Not applicable
- One-month Clinical Evaluation of Silicone Hydrogel Definitive 65 HPT Contact LensesCompletedNCT02312323Not applicable
- Three-month Clinical Evaluation of Silicone Hydrogel Definitive 65 Contact LensesCompletedNCT02249689Not applicable
- Dispensing Study to Assess Visual Performance of Prototype Contact LensesCompletedNCT02214797Not applicable
- Visual Performance of Prototype Contact Lens DesignsCompletedNCT02193555Not applicable
- A New More Efficient Cycloplegia SchemeStatus unknownNCT02177539Phase 4
- Vision Measured by the Vimetrics CVA Compared With Chart Testing Under Similar Luminance and Contrast ConditionsCompletedNCT02028351
- Comparison of Intraocular Lens Power Calculation Methods After Corneal Laser Refractive Surgery in Axial and Refractive AmmertropiaStatus unknownNCT01979172
- Multi-Center Clinical Evaluation of Two Daily Disposable Contact Lenses (Study 2)CompletedNCT01917162Not applicable
- Multi-Center Clinical Evaluation of Two Daily Disposable Contact LensesCompletedNCT01898260Not applicable
- Evaluation of a Surgical Microscope Mounted Autorefractor When Used on Patients Lying in a Supine PositionCompletedNCT01827748Not applicable
- Osmoprotective Containing Lubricants in Dysfunctional Tear Syndrome and Post Refractive Surgery PatientsCompletedNCT01741987Not applicable
- Piggyback Sulcoflex Toric IOL for Correcting Refractive Error Following Corneal TransplantationStatus unknownNCT01718184Not applicable
- Optical Biometry and Spherical Aberration in Ametropic and Emmetropic EyesCompletedNCT01663597
- First-Sight Refractive Error Correction in the Developing WorldCompletedNCT01598818
- Prospective Study of the Health Benefits of Ultra-Violet Filtering Contact LensesCompletedNCT01444313Not applicable
- Retrospective Study of the Health Benefits of Ultra-Violet Filtering Contact LensesCompletedNCT01444053
- Vision Screening for the Detection of AmblyopiaCompletedNCT01430247Not applicable
- First-Sight Refractive Error Correction: Direct Comparison to Autorefraction Results in Children 7 to 18 Years of AgeTerminatedNCT01365884
- Proof of Concept Study for First-Sight Refractive Error Correction: Direct Comparison to Manifest Refraction and Autorefraction ResultsCompletedNCT01342393
- Safety and Efficacy Study to Evaluate the Treatment of Both Near and Distance Vision in a Simultaneous Laser ProcedureCompletedNCT01322919Phase 3
- Fitting Children With Contact LensesCompletedNCT01233089Not applicable