78 studies found for:    Open Studies | "Refractive Errors"
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Dates
Rank Status Study
1 Unknown  First-Sight Refractive Error Correction: Direct Comparison to Autorefraction Results in Children 7 to 18 Years of Age
Condition: Refractive Error
Intervention:
2 Recruiting Piggyback Sulcoflex Toric IOL for Correcting Refractive Error Following Corneal Transplantation
Conditions: Refractive Error;   Corneal Implantation;   Intraocular Lens Implantation
Interventions: Procedure: toric intraocular lens implantation;   Procedure: Sulcoflex intraocular lens implantation
3 Not yet recruiting Dispensing Study to Assess Visual Performance of Prototype Contact Lenses
Conditions: Presbyopia;   Refractive Error
Intervention: Device: Etafilcon A, Lotrafilcon B
4 Not yet recruiting Optical Defocus to Stimulate Eye Elongation in Hyperopia
Conditions: Hyperopia;   Refractive Error
Interventions: Device: Simultaneous Vision Bifocal Soft Contact Lenses;   Device: Single Vision Soft Contact Lenses
5 Recruiting Visual Performance of Prototype Contact Lens Designs
Conditions: Presbyopia;   Refractive Error
Intervention: Device: Etafilcon A, Senofilcon A
6 Unknown  Safety and Efficacy Study to Evaluate the Treatment of Both Near and Distance Vision in a Simultaneous Laser Procedure
Conditions: Myopia;   Hyperopia;   Presbyopia;   Refractive Error
Intervention: Procedure: Supracor
7 Recruiting A New More Efficient Cycloplegia Scheme
Condition: Refractive Errors
Interventions: Drug: Cyclopentolate;   Drug: Cyclopentolate+tropicamide+phenylephrine
8 Recruiting Comparison of Intraocular Lens Power Calculation Methods After Corneal Laser Refractive Surgery in Axial and Refractive Ammertropia
Conditions: Cataract;   Refractive Errors
Intervention:
9 Unknown  The Effect of Gabapentin (Neurentin) and Pregabalin (Lyrica) in Pain Reduction After Photorefractive Keratectomy
Condition: Refractive Errors
Intervention: Drug: Pregabalin
10 Recruiting Safety and Effectiveness of Wavefront-Guided LASIK Correction of Hyperopic Refractive Errors
Condition: Hyperopia
Intervention: Device: LASIK correction of hyperopic refractive errors
11 Recruiting Safety and Effectiveness of Wavefront-guided LASIK for the Correction of Mixed Astigmatism
Condition: Astigmatism
Intervention: Device: LASIK
12 Recruiting Corneal Epithelium Repair and Therapy Using Autologous Limbal Stem Cell Transplantation
Conditions: Corneal Disease;   Pterygium;   Myopia;   Hyperopia
Interventions: Procedure: LSCs and amniotic membrane (Modified Technique);   Procedure: Amniotic membrane only (Traditional Technique);   Procedure: PRK, LSCs, and amniotic membrane (Modified Technique);   Procedure: PRK only (Traditional Technique);   Drug: Levofloxacin;   Drug: Betamethasone;   Drug: Limbal stem cells (LSCs)
13 Not yet recruiting Myopia:the Role of Cone Opsin Mutations & Glasses That Control Axial Elongation
Condition: Myopia
Interventions: Other: Spectacles with red-blocking tint;   Other: Spectacles with holographic diffuser and color neutral tint;   Other: Spectacles with holographic diffuser and red-blocking tint;   Other: Spectacles with color neutral tint
14 Recruiting The Efficacy and Safety of Periocular Acupoint Stimulation on Myopia Progression in Children
Condition: Myopia
Intervention: Device: massager
15 Unknown  The Collaborative Longitudinal Evaluation of Ethnicity and Refractive Error (CLEERE) Study
Condition: Myopia
Intervention:
16 Unknown  Early Vitrectomy for Macular Tractional Maculopathy
Condition: Myopia, Degenerative
Intervention: Procedure: Early vitrectomy
17 Recruiting Corneal Power, Astigmatism, and Aberration Changes After LASIK
Condition: Measurements of Patients Using OCT Before and After LASIK
Intervention:
18 Unknown  Compare Anterior Chamber Biometry in Healthy and Post-LASIK Patients
Conditions: Myopia;   Astigmatism
Intervention:
19 Recruiting Wavefront-guided PRK vs Wavefront-optimized PRK
Conditions: Myopia;   Astigmatism
Interventions: Procedure: Wavefront-guided PRK;   Procedure: Wavefront-optimized PRK
20 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)

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Indicates status has not been verified in more than two years