77 studies found for:    Open Studies | "Refractive Errors"
Show Display Options
Rank Status Study
21 Recruiting Trial of the PresView Implant for the Improvement of Near Vision in Presbyopic Patients
Condition: Presbyopia
Intervention: Device: PresVIEW Device Implantation
22 Recruiting CLARITI (TM) 1Day Multifocal Contact Lenses Performance and Acceptance Evaluation
Condition: Presbyopia Correction
Interventions: Device: Near Vision Spectacles (no contact lenses);   Device: CLARITI 1Day;   Device: Clariti 1Day
23 Not yet recruiting Neurovascular Coupling in Subjects With Amblyopia
Conditions: Amblyopia ex Strabismus;   Amblyopia ex Anisometropia
Interventions: Device: Dynamic Vessel Analyzer;   Other: Laser Doppler Velocimetry;   Device: 7-Tesla MRI;   Other: Pattern electroretinography
24 Unknown  Compare Anterior Chamber Biometry in Healthy and Post-LASIK Patients
Conditions: Myopia;   Astigmatism
Intervention:
25 Recruiting Wavefront-guided PRK vs Wavefront-optimized PRK
Conditions: Myopia;   Astigmatism
Interventions: Procedure: Wavefront-guided PRK;   Procedure: Wavefront-optimized PRK
26 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
27 Recruiting Efficacy Study of Different Lens Treatments on Chinese Adolescent Myopia
Condition: Progressive Myopia
Interventions: Other: Spectacles;   Other: Myovision;   Other: Orthokeratology
28 Recruiting Evaluation of the FluidVision Lens
Condition: Presbyopia
Intervention: Device: Intraocular Lens Implantation
29 Recruiting Low Concentration Atropine for Myopia Progression in School Children
Condition: Myopia Progression
Intervention: Drug: Atropine
30 Recruiting Corneal Power, Astigmatism, and Aberration Changes After LASIK
Condition: Measurements of Patients Using OCT Before and After LASIK
Intervention:
31 Recruiting Myopia Prevalence in Canadian School Children - a Pilot Study
Condition: Myopia
Intervention:
32 Recruiting Prospective Evaluation of the Long-term Effectiveness of the Femtosecond Laser-assisted Arcuate Incisions
Condition: Astigmatism
Intervention:
33 Unknown  Presbyopic Supracor Treatment for Near Myopic/Hyperopic Pseudophakic Eyes
Conditions: Myopia;   Hyperopia;   Presbyopia
Intervention: Device: Supracor
34 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)
35 Unknown  Intrastromal Correction of Ametropia by a Femtosecond Laser
Conditions: Presbyopia;   Myopia;   Hyperopia;   Astigmatism
Interventions: Device: Intrastromal Correction of Presbyopia;   Device: Intrastromal correction of Myopia;   Device: Intrastromal Correction of Hyperopia;   Device: Intrastromal Correction of Myopia incl. Astigmatism;   Device: Intrastromal Correction of Hyperopia incl. Astigmatism
36 Recruiting A Prospective Safety and Effectiveness Study of the 500 Hz Technolas Perfect Vision Excimer Laser Using LASIK
Conditions: Myopia;   Hyperopia
Intervention: Device: Proscan
37 Recruiting Clinical and Genetic Studies in Families With Myopia and Related Diseases
Condition: Myopia
Intervention:
38 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
39 Unknown  SUPRACOR for Myopia and Myopic Astigmatism
Conditions: Myopia;   Myopic Astigmatism;   Presbyopia
Intervention: Procedure: SUPRACOR
40 Recruiting Effect of Orthokeratology Versus Spectacles on Myopia Progression in Chinese Children: A Crossover Trial
Condition: Myopia
Interventions: Device: Orthokeratology;   Device: Spectacle

Show previous page of results Previous Page (1-20) Studies Shown (21-40) Next Page (41-60) Show next page of results
Indicates status has not been verified in more than two years