81 studies found for:    Open Studies | "Refractive Errors"
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Rank Status Study
21 Unknown  Genomewide Screening of Pathological Myopia
Condition: Pathological Myopia
Intervention:
22 Recruiting Impact of a Corneal Pre-cut on Wound Architecture and Astigmatism in Cataract Surgery - a Pilot Study
Condition: Cataract
Interventions: Procedure: Corneal precut 600µm;   Procedure: Corneal stabincision
23 Recruiting Advanced Surface Ablation (ASA) vs Laser-Assisted In Situ Keratomileusis (LASIK)
Conditions: Nearsightedness;   Farsightedness;   Astigmatism
Intervention:
24 Unknown  Prospective Evaluation of Limbal Relaxing Incision (LRI) in Conjunction With Phacoemulsification Surgery for Astigmatic Correction in Chinese Eyes
Condition: Corneal Astigmatism
Intervention: Procedure: Limbal relaxing incision
25 Recruiting Post Approval Study of the AcrySof® IQ Toric Intraocular Lens (IOL) Models SN6AT6-SN6AT9
Conditions: Cataracts;   Astigmatism
Interventions: Device: SN6AT6 Intraocular Lens;   Device: SN6AT7 Intraocular Lens;   Device: SN6AT8 Intraocular Lens;   Device: SN6AT9 Intraocular Lens;   Device: SN60WF Intraocular Lens
26 Unknown  Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia
Conditions: Astigmatism;   Cataract
Interventions: Procedure: phacoemulsification;   Device: Pentacam (Oculus,Germany)examination
27 Recruiting Clinical Performance of Habitual Hydrogel vs. Silicone Hydrogel Toric Contact Lenses
Condition: Astigmatism
Intervention: Device: enfilcon A
28 Recruiting Prospective Investigation of SUPRACOR Visual Outcomes of Presbyopic Hyperopic Patients With and Without Astigmatism
Condition: Hyperopic Presbyopia
Intervention: Device: SUPRACOR LASIK treatment
29 Recruiting Driving Simulator Study Comparing Two Modes of Presbyopic Correction With Contact Lenses
Condition: Presbyopia
Interventions: Device: Lotrafilcon B multifocal contact lenses (MF);   Device: Lotrafilcon B spherical contact lenses (MV) (SVD);   Device: Comfilcon A multifocal contact lenses (BM)
30 Unknown  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
31 Not yet recruiting A Prospective Safety and Effectiveness Study of a New High Repetition Rate Excimer Laser Using LASIK for the Correction of Ammetropia and Presbyopia
Conditions: Myopia;   Hyperopia;   Presbyopia
Interventions: Procedure: Proscan;   Procedure: Zyoptix;   Procedure: Supracor
32 Not yet recruiting Myopia Control With the Multi-segment Lens
Condition: Myopia
Intervention: Device: Multiple-Segment spectacle lens
33 Recruiting Use of the Visumax™ Femtosecond Laser
Condition: Myopia
Intervention: Device: Treatment with the VisuMax™ Femtosecond Laser
34 Unknown  Trial of Myopia Prevention Using +3D Lenses
Condition: Myopia
Intervention: Device: +3D Lenses
35 Recruiting Safety and Efficacy of AGN-199201 and AGN-190584 in Patients With Presbyopia
Condition: Presbyopia
Interventions: Drug: AGN-199201;   Drug: AGN-190584;   Drug: AGN-199201 Vehicle
36 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
37 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)
38 Recruiting Evaluation of the FluidVision Lens
Condition: Presbyopia
Intervention: Device: Intraocular Lens Implantation
39 Recruiting Low Concentration Atropine for Myopia Progression in School Children
Condition: Myopia Progression
Intervention: Drug: Atropine
40 Unknown  Clinical Evaluation of Toric Intraocular Lens Made by Aurolab
Condition: Astigmatism
Intervention: Device: Experimental - Toric Intraocular lenses

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Indicates status has not been verified in more than two years