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 Recruiting Study to Evaluate the Safety and Efficacy of HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens
Condition: Refractive Errors
Intervention: Device: HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens
4 Not yet recruiting Measurement Repeatability in Contemporary Aberrometry
Condition: Refractive Errors
Interventions: Device: Peramis aberrometry;   Device: iDesign aberrometry
5 Recruiting The Effect of Gabapentin (Neurentin) and Pregabalin (Lyrica) in Pain Reduction After Photorefractive Keratectomy
Condition: Refractive Errors
Intervention: Drug: Pregabalin
6 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
7 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
8 Recruiting Visual and Optics Impact of Refractive Surgery
Condition: Refractive Disorders
Intervention:
9 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%
10 Not yet 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)
11 Recruiting Effect of Peripheral Defocus on Axial Growth in Hyperopes
Conditions: Hyperopia;   Amblyopia;   Anisohyperopia
Interventions: Device: Multifocal contact lenses;   Device: Single vision contact lenses
12 Recruiting The Collaborative Longitudinal Evaluation of Ethnicity and Refractive Error (CLEERE) Study
Condition: Myopia
Intervention:
13 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
14 Recruiting Clinical Evaluation of HPT Treated Rigid Contact Lenses Made From Roflufocon D
Condition: Ametropia
Interventions: Device: roflufocon D contact lenses;   Device: RGP contact lenses made from roflufocon D
15 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
16 Recruiting Assessment of Near Vision Capacity in Different Light Intensities
Condition: Presbyopia
Intervention: Procedure: BB-Phaco
17 Recruiting Functional Assessment of ADL in Patients Who Underwent Bifocal and Trifocal Presbyopic Correction
Condition: Presbyopia
Interventions: Procedure: Phaco with Restor;   Procedure: Phaco with Panoptix
18 Recruiting Comparison of Next Generation Laser Techniques of Myopia Correction: iDesign vs. SMILE
Condition: Myopia
Interventions: Other: iDesign;   Other: SMILE
19 Not yet recruiting Comparison of Topography Guided LASIK With WaveLight® EX500 to SMILE With Zeiss VisuMax
Conditions: Myopia;   Astigmatism
Interventions: Procedure: Topography Guided LASIK;   Procedure: Small Incision Lenticular Extraction;   Device: WaveLight EX500 Excimer Laser System;   Device: VisuMax Surgical Laser
20 Recruiting CLEAR CARE® PLUS for Presbyopic Contact Lens Wearers
Condition: Presbyopia
Interventions: Device: Clear Care® Plus Contact Lens Solution;   Device: Habitual Multi-Purpose Contact Lens Solution;   Device: Habitual Contact Lenses

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