Refractive Errors

177 registered clinical trials studyying Refractive Errors — 18 currently recruiting.

Status	Trial	Sponsor	Phase
Not Yet Recruiting	Eye Health Intervention Study in Upper Manhattan NCT06112431	Columbia University	N/A
Not Yet Recruiting	Factors Influencing Subjective Visual Quality in Human Eyes NCT07518316	Tianjin Eye Hospital	N/A
Recruiting	Morphological Characteristics of the Maxillomandibular Region in a 3D Representation and the Refractive Status NCT07460557	University of Zagreb	—
Not Yet Recruiting	Strengthening Community- to- Hospital Eye Care Pathways From Boko Eye Care Center in Rural Assam NCT07333248	Seva Canada Society	N/A
Not Yet Recruiting	Measurment of Optic Disc Parameters, RNFL Thickness and Ganglion Cell Complex in Myopic, Hypermetropic and Emm NCT07241806	Assiut University	—
Not Yet Recruiting	Xinxing Eye Cohort Study NCT07257536	Zhongshan Ophthalmic Center, Sun Yat-sen University	—
Not Yet Recruiting	Assessing the Turkish DDIVAT for Visual Acuity Measurement NCT07240480	Trakya University	—
Active Not Recruiting	Clinical Investigation of a Femtosecond Laser for Corneal Flap Creation NCT07036835	Alcon Research	N/A
Recruiting	Clinical Data Collection of Myopic Patients After PTK-PRK With CZM MEL 90 Excimer Laser NCT06996353	London Vision Clinic	—
Completed	Evaluation of Delefilcon A Contact Lenses NCT06884202	Alcon Research	N/A
Active Not Recruiting	Efficacy of PEEK Acuity Versus ETDRS Chart for Assessment of Visual Acuity and Refractive Error NCT06913491	Superior University	—
Active Not Recruiting	Comparative Efficacy of Duochrome Test Verse +1 Blur Test in Detecting Refracting Error Across Different Ages NCT07001124	Superior University	N/A
Not Yet Recruiting	Real-World Study of Myopia Prevention and Control in Children NCT06849895	Shanghai Eye Disease Prevention and Treatment Center	—
Completed	Investigation of the Accuracy of an Automated Refractor to Provide Well-tolerated Eyeglass Prescriptions NCT06883032	PlenOptika, Inc.	N/A
Recruiting	Correcting Myopia Among Secondary School Children to Increase Academic High School Attendance Rates in Rural C NCT04077086	Queen's University, Belfast	N/A
Completed	A Clinical Trial to Evaluate the Vision Correction Safety and Efficacy of MSiHy Silicone Hydrogel Soft Contact NCT06716385	Visco Vision Inc.	N/A
Completed	A Clinical Trial to Evaluate the Vision Correction Safety and Efficacy of DSiHy Silicone Hydrogel Soft Contact NCT06716372	Visco Vision Inc.	N/A
Active Not Recruiting	Performance of Refractometers With Self-adjusting Lenses Compared to Cycloplegia in Children (REFRALENS) NCT06668246	University Hospital, Brest	—
Terminated	Post-market Clinical Follow-up Study of Alcon PRECISION1™ Spherical and PRECISION1™ for Astigmatism Soft Conta NCT06462456	Alcon Research	—
Recruiting	Clinical Investigation for a Multifunction Ophthalmic Measurement Device NCT06565091	Essilor International	N/A
Not Yet Recruiting	Correction of Refractive Error Surprises After Cataract Surgery in Adults NCT06379477	Assiut University	N/A
Recruiting	To Study the Effects of Refractive Surgery on OCT Measurements in the Eye NCT05856786	University of Nebraska	—
Completed	T30 for Astigmatism in Digital Device Users NCT06266728	Southern College of Optometry	N/A
Completed	Safety and Suitability of ICL for Correction of Refractive Errors Without the Use of Dispersive OVDs NCT06371079	Loay Abdulmutalib Almusawi	—
Unknown	Identification of Minimum Focal Points in Vision Curve Formation NCT06260852	Democritus University of Thrace	—
Recruiting	Cognitive Level Enhancement Through Vision Exams and Refraction NCT05458323	Queen's University, Belfast	N/A
Completed	Visual Outcomes After Extended Depth of Focus Intraocular Lens Implantation With and Without Digital Assistanc NCT06460389	Democritus University of Thrace	—
Unknown	Changes in Angle Kappa and Corneal Back Elevations After Laser in Situ Keratomileusis in Myopic Astigmatism NCT06166212	Ain Shams University	—
Terminated	Seeing to Learn in Sierra Leone NCT06065631	University of Minnesota	N/A
Completed	Contralateral Study of WaveLight® Femtosecond Laser Devices for Corneal Flap Creation NCT06021353	Alcon Research	N/A
Completed	Total30 for Astigmatism Contact Lenses NCT06052046	Southern College of Optometry	N/A
Completed	Clinical Assessment of a Daily Disposable Soft Silicone Hydrogel Contact Lens NCT06044948	Alcon Research	N/A
Completed	Air Optix® Night and Day® Aqua Continuous Wear NCT05992675	Alcon Research	—
Completed	Air Optix® Night and Day® Aqua Daily Wear NCT05976750	Alcon Research	—
Unknown	EyeQue VisionCheck 510(k) Clinical Trial NCT06044688	EyeQue Corp.	N/A
Unknown	Cycloplegic Refraction in Pediatric Patients With Esotropia NCT06077682	Islamic Hospital, Jordan	Phase 4
Completed	Air Optix Plus HydraGlyde Multifocal Daily/Extended Wear Contact Lenses NCT05886894	Alcon Research	—
Completed	Air Optix Extended Wear Contact Lenses NCT05886881	Alcon Research	—
Completed	Air Optix Daily Wear Contact Lenses NCT05827224	Alcon Research	—
Unknown	Effect of Peripapillary Atrophy to Diagnose Glaucoma in High Myopia NCT05964634	Zhongshan Ophthalmic Center, Sun Yat-sen University	—
Completed	Plasma Pharmacokinetics and Safety of LNZ101 and LNZ100 Ophthalmic Solutions in Healthy Adult Subjects With Pr NCT05936489	LENZ Therapeutics, Inc	Phase 1
Completed	Assessing the Clinical Performance of Two Frequent Replacement Silicone Hydrogel Multifocal Toric Contact Lens NCT05886907	Alcon Research	N/A
Completed	Clinical Performance Assessment of Two Silicone Hydrogel Daily Disposable Contact Lenses NCT05725317	Alcon Research	N/A
Unknown	Prevalence of Refractive Errors in Primary School Children NCT05781997	Assiut University	—
Completed	Pre-symptomatic Screening of Visual Acuity in Pre-school Students NCT05835193	Democritus University of Thrace	—
Withdrawn	Clinical Comparison of Toric Contact Lenses Fit Characteristics NCT05805345	Alcon Research	N/A
Completed	Effect of Repeated Low-Level Red-Light Therapy on Retinal Function and Structure NCT05597397	Shanghai Eye Disease Prevention and Treatment Center	N/A
Unknown	Light Emitting Diodes With a Continuous Spectrum of 430-780nm for Myopia Prevention NCT05728762	Zhongshan Ophthalmic Center, Sun Yat-sen University	N/A
Unknown	Access to EyeGlasses for School-aged Children NCT05588362	Boston Children's Hospital	N/A
Enrolling By Invitation	Correlation Between Preoperative Refraction and Anterior Segment Parameters With ICL Vault NCT05670626	Kasr El Aini Hospital	N/A
Recruiting	Community Intervention and Demonstration Area Construction NCT05715424	Anhui Medical University	N/A
Active Not Recruiting	Repeated Low-Level Red-Light Therapy for Shortening Axial Length NCT05550740	Shanghai Eye Disease Prevention and Treatment Center	N/A
Unknown	Prospective Multicenter Clinical Study on the Visual and Refractive Outcomes and Safety Outcomes Following Imp NCT05596682	Medicontur Medical Engineering Ltd	—
Unknown	Visual Outcome of Vitrectomy After Refractive Surgery NCT05583253	Benha University	N/A
Completed	Evaluation of the Safety and Effectiveness of Aceclidine (LNZ101) and Aceclidine + Brimonidine (LNZ100) in the NCT05431543	LENZ Therapeutics, Inc	Phase 2
Completed	Comparison of Premium Monovision and Bilateral Implantation of Trifocal Diffractive Intraocular Lenses NCT05494177	Democritus University of Thrace	—
Completed	Clinical Performance of Two Reusable Silicone Hydrogel Contact Lenses NCT05431478	Alcon Research	N/A
Recruiting	Effect of Colour Temperature of Reading Lamp on Refractive Error Development NCT05733182	The Hong Kong Polytechnic University	N/A
Completed	Dilated Versus Non-Dilated Wavefront Corrections for Patients With Down Syndrome NCT05059041	Ohio State University	Phase 2
Completed	Evaluation of the Safety and Effectiveness of Aceclidine/Brimonidine (LNZ101) and Aceclidine (LNZ100) in the T NCT05294328	LENZ Therapeutics, Inc	Phase 2
Unknown	Correction of Anisometropic Amblyopia in Children. NCT05325021	Benha University	—
Completed	Clinical Assessment of a Daily Wear Monthly Replacement Silicone Hydrogel Toric Contact Lens NCT05211739	Alcon Research	N/A
Unknown	Comparison of Visual Acuity Performed in Office Versus In Residence NCT05250986	Gobiquity Mobile Health	—
Completed	Assessment of Visual Acuity in Refugee Population NCT05209581	Democritus University of Thrace	—
Completed	Clinical Performance of Two Daily Disposable Soft Contact Lenses NCT05138783	Alcon Research	N/A
Completed	Clinical Assessment of Two Daily Wear Reusable Soft Silicone Hydrogel Contact Lenses NCT05056987	Alcon Research	N/A
Unknown	Study in Pediatric Volunteers of a Handheld Device Versus a Standard Diagnostic Device in Ophthalmic Refractio NCT04955379	EyeQue Corp.	N/A
Active Not Recruiting	Clinical Trial With Artiflex Presbyopic (Artiplus) NCT04632784	Ophtec BV	N/A
Completed	Clinical Assessment of Two Reusable Silicone Hydrogel Contact Lenses NCT05050578	Alcon Research	N/A
Completed	Clinical Comparison of 2 Daily Disposable Toric Soft Contact Lenses NCT05039112	Alcon Research	N/A
Unknown	Study to Evaluate the Reliability, Validity and Safety of Subjective Mobile Refraction NCT05049070	1800 Contacts, Inc.	N/A
Completed	Clinical Performance of Two Commercial, Daily Disposable Contact Lenses NCT05010512	Alcon Research	N/A
Unknown	Efficacy and Safety of Astaxanthin in Volunteer With Refraction Errors NCT05009810	Chulalongkorn University	N/A
Completed	Clinical Performance of Two Daily Disposable Toric Soft Contact Lenses NCT04908488	Alcon Research	N/A
Completed	Clinical Comparison of Two Daily Disposable Contact Lenses NCT04865354	Alcon Research	N/A
Active Not Recruiting	The Effect of Early Glasses on the Development of Amblyopia NCT04740593	Erasmus Medical Center	N/A
Completed	Three Daily Wear Monthly Replacement Silicone Hydrogel Contact Lenses With Two Multi-purpose Disinfecting Solu NCT04789382	Alcon Research	N/A
Unknown	Repeated Low-Level Red-Light Therapy and Orthokeratology in Fast-progressing Myopia Control NCT04722874	Zhongshan Ophthalmic Center, Sun Yat-sen University	N/A
Unknown	Panoptix Trifocal Lens in Post Refractive Myopic Laser Vision Correction Surgery NCT04698278	Parkhurst NuVision Clinical Research LLC	—
Unknown	Prevalence and Environmental Factors for Myopia Among Chinese School-aged Children and Adolescent in Tianjin NCT05336799	Tianjin Eye Hospital	—
Unknown	A Web-based Digital Distance Visual Acuity Test NCT04756596	Democritus University of Thrace	—
Completed	Clinical Characterization of an Investigational Frequent Replacement Daily Wear Silicone Hydrogel Sphere Conta NCT04702984	Alcon Research	N/A
Unknown	Smart-TV Application for the Self Examination of the Distance Visual Acuity in Macular Edema Patients NCT04739137	Democritus University of Thrace	—
Unknown	Patients' Satisfaction After LASIK NCT04109040	Assiut University	—
Completed	The Effect of the Free-toroidal Design Lenses on the Subjective Visual Quality in the Myopic Population NCT05684302	Tianjin Eye Hospital	—
Unknown	Study on the Effect of Two Ways of Cycloplegia on Biological Parameters of Ciliary Muscle NCT05449015	Shanghai Eye Disease Prevention and Treatment Center	Phase 4
Completed	Clinical Characterization of an Investigational Soft Silicone Hydrogel Contact Lens NCT04631796	Alcon Research	N/A
Completed	Development and Validation of an Internet-based Near and Intermediate-vision Reading Test NCT04618224	Democritus University of Thrace	—
Unknown	Digital Wavefront Sensing NCT04597255	Medical University of Vienna	N/A
Completed	Refractive Changes Following Vitrectomy NCT04712786	Bursa Retina Eye Hospital	—
Completed	Providing Financial Incentives to Improve Adherence to Referral Eye Care Visits NCT04328207	University of Alabama at Birmingham	N/A
Unknown	Handheld Device Compared With a Standard Eye Care Diagnostic Device in Measuring Ophthalmic Refraction NCT04693247	EyeQue Corp.	N/A
Unknown	Outcomes of a Trifocal IOL in Post-refractive Patients NCT04545073	Vance Thompson Vision ND	—
Completed	Clinical Evaluation of a Silicone Hydrogel Daily Wear Monthly Replacement Contact Lens NCT04422990	Alcon Research	N/A
Completed	Clinical Comparison of 2 Daily Disposable Contact Lenses - Pilot Study 1 NCT04527978	Alcon Research	N/A
Completed	Clinical Comparison of Two Daily Wear Frequent Replacement Silicone Hydrogel Soft Contact Lenses NCT04532099	Alcon Research	N/A
Completed	Clinical Comparison of 2 Daily Disposable Contact Lenses - Pilot Study 2 NCT04528017	Alcon Research	N/A
Withdrawn	Customizing Myopia Control With Multifocal Toric Contact Lens NCT04352868	University of Alabama at Birmingham	N/A
Completed	Pilot Clinical Performance of a Silicone Hydrogel Lens for Up to Six Nights of Extended Wear NCT04403542	Alcon Research	N/A
Completed	Clinical and Refractive Outcomes After Contoura® Refractive Surgery Planned Using Phorcides Surgery Planning S NCT04495829	American Corneal Consultants	—
Completed	Safety and Effectiveness of the Qualis Contact Lens NCT04295499	Unicon Optical Co. Ltd.	N/A
Completed	Association Between ORA and Residual Refractive Astigmatism After SMILE NCT05604872	Taipei Nobel Eye Clinic	—
Withdrawn	Excimer Laser Surgery for Anisometropic Amblyopia NCT03342235	Jaeb Center for Health Research	N/A
Unknown	Anesthetic Impregnated Bandage Soft Contact Lens (BSCL) in Pain Management After Photorefractive Keratectomy ( NCT04283331	Beeran Meghpara, MD	Phase 4
Completed	Early Feasibility Study to Evaluate the AccuraSee in Correcting Residual Refractive Errors After Cataract Surg NCT05113979	OnPoint Vision Inc	—
Completed	Clinical Performance Evaluation of Two Daily Disposable Silicone Hydrogel Toric Contact Lenses NCT04254003	Alcon Research	N/A
Completed	Clinical Evaluation of a Daily Wear Monthly Replacement Silicone Hydrogel Lens NCT04178720	Alcon Research	N/A
Completed	Clinical Evaluation of a Daily Wear Silicone Hydrogel Lens NCT04207749	Alcon Research	N/A
Completed	Apioc Presbyopic Contact Lens NCT04437732	Lentechs, LLC	N/A
Completed	Clinical Performance Assessment of a Daily Wear Monthly Replacement Soft Silicone Hydrogel Contact Lens NCT04055519	Alcon Research	N/A
Unknown	Investigating the Effect of Using Myopia Prediction Algorithm on Myopia Children NCT04044755	Sun Yat-sen University	N/A
Unknown	Efficacy of Repeated Low-Level Red-Light Therapy in Myopia Control NCT04073238	Zhongshan Ophthalmic Center, Sun Yat-sen University	N/A
Completed	Clinical Performance of Two Daily Disposable Contact Lenses - Study 1 NCT03969290	Alcon Research	N/A
Completed	Peripheral Defocus Profile of Multifocal Minus Contact Lenses NCT06335212	State University of New York College of Optometry	—
Completed	Apioc Toric/Spherical Single Vision Contact Lens NCT03970512	Lentechs, LLC	N/A
Completed	Clinical Evaluation of a Daily Wear Frequent Replacement Silicone Hydrogel Lens NCT03920280	Alcon Research	N/A
Completed	Study of a Hand-held Device Plus Mobile App Versus Standard Eye Care Devices in Measuring Refractive Error of NCT03929588	EyeQue Corp.	N/A
Unknown	Choroidal Thickness Change in Response to Physiological and Refractive Changes NCT03906279	Wrocław University of Science and Technology	—
Completed	Clinical Evaluation of Acuity 200 (Fluoroxyfocon A) RGP Contact Lens NCT03971227	Acuity Polymers, Inc.	N/A
Completed	PAVES Benchmarking Pilot Study of Daily Disposable Contact Lenses NCT04032457	Vision Service Plan	N/A
Unknown	PiXL as a Treatment for Low Grade Myopia NCT04663048	Umeå University	N/A
Unknown	Chromatic and Monochromatic Optical Aberrations After Corneal Refractive Surgery NCT03893838	Wrocław University of Science and Technology	—
Completed	Binocular Vision Anomalies After Cataract and Refractive Surgery NCT03592615	Salus University	N/A
Unknown	Treatment of Residual Hypermetropic Refraction on Young Patients After LASIK Using Human Fresh Corneal Lenticu NCT04793893	Eye Hospital Pristina Kosovo	N/A
Completed	Changes in Refractive Error in Patients With Both Partially Refractive Esotropia and Amblyopia NCT04429659	Sakarya University	—
Completed	Femto-flap Versus SBK Flap,Predictability and Variability NCT04684888	Suzan A Rattan	N/A
Unknown	Rapid Computerized Visual Acuity Test NCT05447845	Rambam Health Care Campus	—
Completed	Performance Assessment of a Modified Daily Disposable Contact Lens NCT03762668	Alcon Research	N/A
Unknown	Evaluation of Different Lenticule Diameters in Myopic Astigmatism Correction With SMILE Procedures NCT06062004	Al Watany Eye Hospital	N/A
Completed	Trifocal Diffractive Intraocular Lens After Cataract Extraction With Phacoemulsification NCT04465279	Alexandria University	Phase 2 / Phase 3
Suspended	Evaluation of Progression of Myopia in Children Treated With Vitamin B2 and Outdoor Sunlight Exposure NCT03552016	University of Missouri-Columbia	Phase 2
Withdrawn	Safety and Efficacy of a Sub-epitheilal Transform™ Corneal Allograft (TCA) for Presbyopia Correction NCT03675438	Allotex, Inc.	N/A
Completed	Trial of an Educational Intervention to Promote Spectacle Use Among Secondary School Children in Islamabad, Pa NCT03670303	Isra University	N/A
Completed	PRO Measure for Refractive Surgery IRAS Project Number 246072 NCT03655743	Moorfields Eye Hospital NHS Foundation Trust	—
Completed	Clinical Performance of a Silicone Hydrogel Contact Lens Following Six Nights of Extended Wear NCT03614130	Alcon Research	N/A
Completed	Anxiety-related Fixation Instability During LASIK NCT06148428	Assiut University	—
Completed	Clinical Performance of a Monthly Replacement Silicone Hydrogel Lens NCT03586167	Alcon Research	N/A
Completed	Clinical Performance of a Silicone Hydrogel Contact Lens Following One Night of Extended Wear NCT03560141	Alcon Research	N/A
Completed	Clinical Validation of DACP Digital Design NCT03567005	Alcon Research	N/A
Completed	Village-Integrated Eye Worker Trial II - Pilot NCT03278587	University of California, San Francisco	N/A
Completed	Clinical Comparison of Two Daily Disposable Soft Contact Lenses NCT03518008	Alcon Research	N/A
Completed	Performance of 2WIN Photoscreener With Corneal Reflex Compared to School Bus Retinoscopy by AAPOS Guidelines NCT03668067	Alaska Blind Child Discovery	—
Completed	Clinical Evaluation of Two Monthly Contact Lenses NCT03459131	Alcon Research	N/A
Completed	Photorefractive Intrastromal Corneal Crosslinking as a Treatment for Low Grade Myopia NCT03987880	Umeå University	N/A
Completed	Premium Monovision Versus Other Types of Monovision and Bilateral Trifocal Implantation. NCT04618380	Democritus University of Thrace	—
Completed	Investigation of the Accuracy of a Low-cost, Portable, Autorefractor to Provide Well-tolerated Eyeglass Prescr NCT03615612	Johns Hopkins University	N/A
Unknown	Comparison of a Smartphone Based Self Refraction Tool With Conventional Refraction Error Estimation Methods NCT03419351	University Hospital Tuebingen	N/A
Unknown	Correlation Between Refraction and Biometric Parameters NCT04346251	Sun Yat-sen University	—
Completed	DD T2 Daily Disposable Registration Trial NCT03305770	Alcon Research	N/A
Unknown	Direct Comparison of SVOne Obtained Refraction to Subjective Manifest Refraction NCT03222661	Smart Vision Labs	—
Completed	Measurement of Refractive SE Following Implantation of LS313 MF30 IOL NCT03292614	Dietrich-Bonhoeffer-Klinikum	—
Completed	Assessing Fitting Guides in Alcon Multifocal Contact Lenses NCT03118934	Alcon Research	N/A
Completed	Clinical Biocompatibility Evaluation of Contact Lens Coatings NCT03034928	Alcon Research	N/A
Completed	Clinical Assessment of a HYDRAGLYDE® Regimen NCT03026257	Alcon, a Novartis Company	N/A
Completed	Refractive Outcomes After Cataract Surgery in Eyes With Pseudoexfoliation Syndrome NCT04783909	Medical University of Lublin	—
Unknown	Academic Performance and Refractive Error NCT04338880	Sun Yat-sen University	—
Completed	Bifocal & Atropine in Myopia (BAM) Study NCT03312257	Jenny Jones	N/A
Recruiting	Corneal Elastography and Patient Specific Modeling NCT03030755	The Cleveland Clinic	—
Completed	VisuMax Femtosecond Laser Small Incision Lenticule Extraction for the Correction of High Myopia NCT02528123	London Vision Clinic	N/A
Unknown	Measurement Repeatability in Contemporary Aberrometry NCT02687022	Moorfields Eye Hospital NHS Foundation Trust	N/A
Unknown	Environmental Health and Myopia Prevention and Control NCT04161326	Sun Yat-sen University	—
Completed	Bifocal Lenses In Nearsighted Kids NCT02255474	Ohio State University	N/A
Unknown	Study to Evaluate the Safety and Efficacy of HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens NCT02812316	Taipei Medical University Hospital	N/A
Unknown	A New More Efficient Cycloplegia Scheme NCT02177539	Pontificia Universidad Catolica de Chile	Phase 4
Unknown	Comparison of Intraocular Lens Power Calculation Methods After Corneal Laser Refractive Surgery in Axial and R NCT01979172	The National Eye Hospital, Cairo, Egypt	—
Completed	Optical Biometry and Spherical Aberration in Ametropic and Emmetropic Eyes NCT01663597	Medical University of Vienna	—
Completed	Prevalence of Blindness, Visual Impairment in Chao Nan Area, China NCT04143334	Chinese University of Hong Kong	—
Completed	Vision Screening for the Detection of Amblyopia NCT01430247	Mladen Busic	N/A
Completed	Retrospective Study of the Health Benefits of Ultra-Violet Filtering Contact Lenses NCT01444053	Johnson & Johnson Vision Care, Inc.	—
Completed	Prospective Study of the Health Benefits of Ultra-Violet Filtering Contact Lenses NCT01444313	Johnson & Johnson Vision Care, Inc.	N/A
Unknown	Study to Evaluate the Clinical Performance of SynergEyes A2 Hybrid Contact Lenses NCT01058629	SynergEyes, Inc.	N/A
Terminated	Corneal Flap Thickness Planed vs Measured After LASIK by Using Tree Different Systems Cut NCT00558324	Asociación para Evitar la Ceguera en México	N/A
Completed	Effects of Different Add Powers on the Comfort and Productivity of Computer Users With Fixed or Free Head Move NCT00317525	American Optometric Association	Phase 3
Completed	Comparison of Higher Order Aberrations and Contrast Sensitivity Between Acrysof SN60AT, SN60WF and Restore Int NCT00345085	University of Texas Southwestern Medical Center	—
Completed	Customized PRK With Mitomycin Versus Customized Lasik for Myopic Astigmatism NCT00365040	Federal University of São Paulo	N/A
Completed	A Prospective Comparison of Alcon LADARVision Wavefront-guided LASIK Enhancement and Conventional LASIK Enhanc NCT00413881	Walter Reed Army Medical Center	N/A
Unknown	The Effect of Gabapentin (Neurentin) and Pregabalin (Lyrica) in Pain Reduction After Photorefractive Keratecto NCT01122004	Shahid Beheshti University of Medical Sciences	Phase 1