85 studies found for:    Open Studies | "Refractive Errors"
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Rank Status Study
21 Recruiting Efficacy and Safety of Ranibizumab 0.5 vs Veteporfin PDT in Patients With Visual Impairment Due to Choroidal Neovascularization Secondary to Pathologic Myopia
Condition: Visual Impairment Due to Choroidal Neovascularization Secondary to Pathologic Myopia
Interventions: Drug: Ranibizumab 0.5mg;   Drug: Rranibizumab 0.5 mg;   Drug: Verteporfin PDT
22 Not yet recruiting A Trial of Toric Versus Non-toric Intraocular Lenses in Phacoemulsification Cataract Surgery
Conditions: Cataract;   Astigmatism
Intervention: Device: Phacoemulsfication cataract surgery and intra-ocular lens implant
23 Recruiting Feasibility of Measurement of Optical Aberrations in Hyperopia by Using an Adaptive Optics Visual Simulator (AOVIS-I)
Condition: Hyperopic Patients
Intervention: Device: Monocular Adaptive Optics Visual Simulator (AOVIS-I)
24 Not yet recruiting A Study of the Criteria Establishing the Need for Re-treatment With Ranibizumab Upon Relapse in Patients With Visual Impairment Due to Choroidal Neovascularization Secondary to Pathologic Myopia.
Condition: Choroidal Neovascularization Secondary to Pathologic Myopia
Intervention: Drug: Ranibizumab
25 Not yet recruiting A Prospective Safety and Effectiveness Study of the 500 Hz Technolas Perfect Vision Excimer Laser in Asian Eyes Using LASIK
Conditions: Myopia;   Hyperopia;   Presbyopia
Intervention: Device: Proscan, Zyoptix and Supracor
26 Unknown  Aberration-Free Refraction Correction
Condition: Myopia
Intervention:
27 Recruiting New Treatment Algorithm to Reduce Spherical Aberration After LASIK Correction for Myopia
Conditions: Myopia;   Astigmatism
Interventions: Device: VSS-Rx1 OPM software;   Device: iDesign Advanced CustomVue wavefront-guided LASIK treatment
28 Recruiting Efficacy Study of Different Lens Treatments on Chinese Adolescent Myopia
Condition: Progressive Myopia
Interventions: Other: Spectacles;   Other: Myovision;   Other: Orthokeratology
29 Unknown  Clinical Evaluation of Toric Intraocular Lens Made by Aurolab
Condition: Astigmatism
Intervention: Device: Experimental - Toric Intraocular lenses
30 Recruiting Lacritin and Heparanase Levels in Human Tears After Laser Refractive Surgery
Condition: Myopia
Intervention: Other: Tear collection
31 Recruiting Initial Treatment With Bevacizumab in Choroidal Neovascularization Associated to High Myopia
Condition: Choroidal Subfoveal/Juxtafoveal Neovascularization in High Myopia
Intervention: Drug: Bevazizumab intravitreal injection
32 Not yet recruiting Limbal Relaxing Incision Versus Toric Intraocular Lens for Corneal Astigmatism During Cataract Surgery.
Conditions: Astigmatism;   Cataract
Interventions: Procedure: Limbal Relaxing Incisions;   Device: Toric Intraocular Lens
33 Unknown  Corrected Measurement of the Retinal Nerve Fiber Layer Thickness by Optic Disc Configuration With the Cirrus HD OCT
Conditions: Glaucoma;   Myopia
Intervention:
34 Recruiting Clinical Evaluation of Daily Disposable Contact Lenses
Condition: Myopia
Interventions: Device: Filcon II 3;   Device: etafilcon A;   Device: nelfilcon A
35 Unknown  Compare Anterior Chamber Biometry in Healthy and Post-LASIK Patients
Conditions: Myopia;   Astigmatism
Intervention:
36 Recruiting Wavefront-guided LASIK for Correction of Myopia
Condition: Myopia
Intervention: Procedure: Laser in situ keratomileusis (LASIK)
37 Recruiting Wavefront-guided PRK vs Wavefront-optimized PRK
Conditions: Myopia;   Astigmatism
Interventions: Procedure: Wavefront-guided PRK;   Procedure: Wavefront-optimized PRK
38 Not yet recruiting Refraction Determination Analysis
Conditions: Myopia,;   Hyperopia,;   Astigmatism,;   Presbyopia,;   Eye Strain,
Interventions: Device: Telemedicine refraction;   Device: Traditional refraction
39 Unknown  Hyperopia Correction Using the NTK Optimal Keratoplasty (Opti-K) System
Condition: Hyperopia
Intervention: Device: Optimal Keratoplasty
40 Recruiting Vision Care Intervention for Lower Grade School Children in Taiwan
Conditions: Myopia;   Outdoor Activity;   Policy of Recess Outside Classroom
Intervention: Behavioral: Outdoor activity in recess time

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Indicates status has not been verified in more than two years