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72 studies found for:    Open Studies | "Refractive Errors"
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Rank Status Study
1 Recruiting Prospective S&E Study of Wavefront-guided PRK for Myopia With iDesign Advanced Wavescan Studio™ System and Star S4 IR™
Condition: Stable Myopic Refractive Error, With or Without Astigmatism
Intervention: Device: STAR S4 IR laser with iDesign
2 Recruiting International Multicenter Study on SMILE Surgery
Condition: Refractive Error
Interventions: Procedure: SMILE surgery;   Other: FS-LASIK surgery
3 Not yet recruiting Measurement Repeatability in Contemporary Aberrometry
Condition: Refractive Errors
Interventions: Device: Peramis aberrometry;   Device: iDesign aberrometry
4 Recruiting Dispensing Study to Assess the Visual Performance of Optimised Prototype Contact Lenses
Conditions: Presbyopia;   Refractive Error
Interventions: Device: Etafilcon A;   Device: Nelfilcon A;   Device: Nesofilcon A;   Device: Somofilcon A;   Device: 58% Poly-HEMA;   Device: Omafilcon A
5 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
6 Not yet recruiting Assessing Fitting Guides in Alcon Multifocal Contact Lenses
Conditions: Presbyopia;   Refractive Errors
Interventions: Device: Lotrafilcon B multifocal contact lenses;   Device: Nelfilcon A multifocal contact lenses;   Device: Delefilcon A multifocal contact lenses
7 Recruiting VisuMax Femtosecond Laser Small Incision Lenticule Extraction for the Correction of High Myopia
Conditions: Myopia;   Refractive Errors
Interventions: Procedure: Small incision lenticule extraction;   Drug: Tobramycin and dexamethasone;   Drug: Ofloxacin;   Drug: Proxymetacaine 0.5%;   Drug: Oxybuprocaine 0.4%
8 Recruiting Clinical Assessment of a HYDRAGLYDE® Regimen
Conditions: Refractive Errors;   Myopia;   Hypermetropia
Interventions: Device: Lotrafilcon B contact lenses with added wetting agent;   Device: Samfilcon A contact lenses;   Device: POLYQUAD/ALDOX-preserved contact lens solution with added wetting agent;   Device: Hydrogen peroxide-based contact lens solution with added wetting agent;   Device: Senofilcon C contact lenses;   Device: Senofilcon A contact lenses;   Device: Comfilcon A contact lenses;   Device: Habitual Multi-Purpose Solution (HMPS)
9 Recruiting Corneal Elastography and Patient Specific Modeling
Conditions: Cornea; Ectasia;   Refractive Errors;   Keratoconus
Intervention: Other: Optical coherence tomography
10 Recruiting Effect of Peripheral Defocus on Axial Growth in Hyperopes
Conditions: Hyperopia;   Amblyopia;   Anisohyperopia
Interventions: Device: Multifocal contact lenses;   Device: Single vision contact lenses
11 Not yet recruiting Efficacy of Scleral Contact Lenses for Daily Wear for Regular and Irregular Refractive Errors Compared to Habitually Worn Scleral Lenses
Condition: Scleral Lens Wearers
Intervention: Device: scleral contact lens
12 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
13 Recruiting Bilateral Dispensing Study of MyDay Toric, 1-day Acuvue Moist for Astigmatism, and Dailies Aquacomfort Plus Toric Lenses
Condition: Astigmatism
Interventions: Device: Dailies Aquacomfort Plus toric daily disposable contact lenses;   Device: 1-Day Acuvue Moist toric daily disposable contact lenses;   Device: MyDay A Toric daily disposable contact lens
14 Recruiting A Prospective Study to Evaluate the Raindrop Near Vision Inlay in Presbyopic Patients With Treatments to Optimize the Ocular Surface Before Implantation
Condition: Presbyopia
Interventions: Drug: Mitomycin C;   Device: Raindrop Near Vision Inlay
15 Recruiting A Prospective Study To Evaluate The Raindrop Near Vision Inlay In Presybopic Patients Treated With Mitomycin C Following Femtosecond Flap Creation.
Condition: Presbyopia
Interventions: Drug: Mitomycin c;   Device: Raindrop Near Vision Inlay
16 Recruiting Effect of Plum-blossom Needle vs. Tropicamide Eye Drops on Juvenile Myopia
Condition: Myopia
Interventions: Other: Plum-blossom Needle;   Drug: Tropicamide Eye Drops
17 Recruiting A Prospective, Contralateral, Eye to Eye Comparison of SMILE Surgery to LASIK Surgery
Condition: Myopia
Interventions: Procedure: SMILE;   Procedure: LASIK
18 Recruiting A Comparison of LASIK Outcomes Using Two Femtosecond Lasers
Conditions: Myopia;   Astigmatism
Interventions: Device: Intralase IFS150;   Device: Visumax
19 Not yet recruiting Safety and Efficacy Study of A Viscoelastic-free Method for Implantable Collamer Lens (ICL) Implantation
Condition: Myopia
Interventions: Device: viscoelastic-free implantation system;   Device: standard viscoelastic-assisted Implantation system
20 Recruiting Assessment of Near Vision Capacity in Different Light Intensities
Condition: Presbyopia
Intervention: Procedure: BB-Phaco

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Study has passed its completion date and status has not been verified in more than two years.