94 studies found for:    Open Studies | "Refractive Errors"
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Rank Status Study
21 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
22 Not yet recruiting Clinical Performance of Toric Hydrogel Contact Lenses Following One Week of Daily Wear
Condition: Astigmatism
Interventions: Device: filcon IV1;   Device: ocufilcon D
23 Recruiting Ocular Discomfort Assessment After Intravitreal Injections
Conditions: Macular Degeneration;   Diabetic Retinopathy;   Retinal Artery Occlusion;   Myopia, Degenerative
Intervention: Drug: Optive
24 Not yet recruiting The Effect of Light Deprivation on Visual Functions in Adult Amblyopes
Conditions: Amblyopia;   Anisometropia;   Visual Impairment
Intervention: Device: Blindfold
25 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
26 Recruiting Pseudophakic Astigmatic Reduction With Verion-LenSx Arcuate Incisions
Condition: Astigmatism
Intervention: Procedure: Verion-LenSx
27 Recruiting Safety, Tolerability, and Efficacy of PresbiDrops, a Topical Ophthalmic Drug for Presbyopia
Condition: Presbyopia
Interventions: Drug: PresbiDrops;   Drug: Placebo
28 Recruiting Functional and Physiological Changes Induced by Pinhole Glasses in Presbyopia
Condition: Pinhole
Intervention: Device: Trayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)
29 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
30 Recruiting Shamir Aspheric Ophthalmic Lenses (MyLens) for Myopic Control Clinical Trial
Condition: Myopia
Intervention: Device: Aspheric lens
31 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
32 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
33 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
34 Recruiting Myopia Control Using Soft Bifocal Lenses
Condition: Myopia
Intervention: Device: Bifocal soft contact lenses
35 Recruiting Clinical Evaluation of Efficacy and Stability of AT TORBI 709M 4-haptic Toric IOL in Cataract Surgery
Conditions: Iol;   Astigmatism
Intervention: Procedure: AT TORBI 709M
36 Recruiting Clinical Efficacy of the Pinhole Soft Contact Lenses for Correcting Presbyopia
Condition: Presbyopia
Intervention: Device: Pinhole Soft Contact Lens apply for presbyopia
37 Recruiting A Study of the Concurrent Use of AGN-190584 and AGN-199201 in Participants With Presbyopia
Condition: Presbyopia
Interventions: Drug: AGN-199201 ophthalmic solution;   Drug: AGN-190584 ophthalmic solution;   Drug: AGN-190584 vehicle;   Drug: AGN-199201 + AGN-190584 Combination;   Drug: AGN-199201 vehicle
38 Recruiting Pilot Study of Accommodative/Vergence Therapy to Modify Accommodative Function in Children With Myopia
Condition: Myopia
Intervention: Other: accommodative/vergence therapy
39 Recruiting An Evaluation of LASIK and PRK Surgery in Physicians
Conditions: Nearsightedness;   Farsightedness;   Astigmatism
Intervention: Behavioral: Questionnaire (QoV questionnaire)
40 Recruiting High Resolution Wavefront-guided vs. Wavefront Optimized LASIK
Conditions: Nearsightedness;   Astigmatism
Intervention: Procedure: LASIK

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Indicates status has not been verified in more than two years