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98 studies found for:    Open Studies | "Refractive Errors"
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Rank Status Study
21 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
22 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
23 Recruiting Evaluating the Effect of Laser Vision Surgery, Phakic Intraocular Lens Implantation, Cataract Surgery, and Pupil Dilation on the Iris Recognition Scanner Function of Smartphone
Conditions: Cataract;   Myopia;   Myopic Astigmatism
Intervention: Device: iris recognition scanner
24 Recruiting Performance of Fanfilcon A Toric Lenses After at Least One Month Wearing Enfilcon A Toric Lenses
Condition: Astigmatism
Intervention: Device: fanfilcon A
25 Recruiting The Relationship Between Structure and Visual Function in Myopia Foveoschisis
Condition: High Myopia
Intervention: Procedure: macular buckling surgery
26 Recruiting Changes of Visual Function, Ocular Surface Structures and Physiology After Long-Termed Contact Lens Wear
Conditions: Ocular Surface Disease;   Keratoconus;   Irregular Astigmatism
Interventions: Device: corneal lenses;   Device: large diameter lenses
27 Recruiting Evaluation of the Safety and Efficacy of Corneal Cross Linking for the Treatment of Myopia.
Condition: Myopia
Intervention: Device: CXL Myopie
28 Recruiting Clinical Performance of Toric Hydrogel Contact Lenses Following One Week of Daily Wear
Condition: Astigmatism
Interventions: Device: filcon IV1;   Device: ocufilcon D
29 Recruiting Ocular Discomfort Assessment After Intravitreal Injections
Conditions: Macular Degeneration;   Diabetic Retinopathy;   Retinal Artery Occlusion;   Myopia, Degenerative
Intervention: Drug: Optive
30 Not yet recruiting The Effect of Light Deprivation on Visual Functions in Adult Amblyopes
Conditions: Amblyopia;   Anisometropia;   Visual Impairment
Intervention: Device: Blindfold
31 Recruiting A Safety, Efficacy and Pharmacokinetic Study of AGN-199201 and AGN-190584 in Patients With Presbyopia
Condition: Presbyopia
Interventions: Drug: AGN-199201 ophthalmic solution;   Drug: AGN-190584 ophthalmic solution;   Drug: AGN-199201 Vehicle;   Drug: AGN-190584 Vehicle
32 Recruiting Pseudophakic Astigmatic Reduction With Verion-LenSx Arcuate Incisions
Condition: Astigmatism
Intervention: Procedure: Verion-LenSx
33 Recruiting Safety, Tolerability, and Efficacy of PresbiDrops, a Topical Ophthalmic Drug for Presbyopia
Condition: Presbyopia
Interventions: Drug: PresbiDrops;   Drug: Placebo
34 Recruiting Functional and Physiological Changes Induced by Pinhole Glasses in Presbyopia
Condition: Pinhole
Intervention: Device: Trayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)
35 Recruiting Long Term Effects of Multifocal Orthokeratology on Corneal and Choroidal Structures in Healthy Subjects With Myopia- A Pilot Study
Condition: Myopia
Intervention: Device: Orthokeratology lens
36 Recruiting Shamir Aspheric Ophthalmic Lenses (MyLens) for Myopic Control Clinical Trial
Condition: Myopia
Intervention: Device: Aspheric lens
37 Recruiting A Clinical Trial to Evaluate a Corneal Inlay for the Improvement of Near and Intermediate Vision in Pseudophakic Presbyopic Subjects
Conditions: Presbyopia;   Pseudophakia
Intervention: Device: Raindrop Near Vision Inlay
38 Not yet recruiting Performance of a Photoscreener for Vision Screening in a Haitian Pediatric Population
Conditions: Amblyopia;   Myopia;   Hyperopia;   Astigmatism;   Cataract;   Retinoblastoma;   Trachoma;   Xerophthalmia;   Glaucoma;   Retinopathy of Prematurity
Interventions: Device: Spot photoscreener;   Procedure: Ophthalmologic evaluation;   Procedure: Cyclopleged refraction
39 Recruiting Post-Approval Study of the TECNIS® Toric Extended Cylinder Range Intraocular Lens (IOL)
Conditions: Cataract;   Astigmatism
Intervention: Device: TECNIS Toric Models ZCT450, ZCT525 or ZCT600
40 Recruiting Myopia Control Using Soft Bifocal Lenses
Condition: Myopia
Intervention: Device: Bifocal soft contact lenses

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