88 studies found for:    Open Studies | "Refractive Errors"
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Rank Status Study
21 Not yet recruiting Safety, Tolerability, and Efficacy of PresbiDrops, a Topical Ophthalmic Drug for Presbyopia
Condition: Presbyopia
Interventions: Drug: PresbiDrops;   Drug: Placebo
22 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
23 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
24 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
25 Recruiting Myopia Control Using Soft Bifocal Lenses
Condition: Myopia
Intervention: Device: Bifocal soft contact lenses
26 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
27 Recruiting Clinical Efficacy of the Pinhole Soft Contact Lenses for Correcting Presbyopia
Condition: Presbyopia
Intervention: Device: Pinhole Soft Contact Lens apply for presbyopia
28 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
29 Recruiting Pilot Study of Accommodative/Vergence Therapy to Modify Accommodative Function in Children With Myopia
Condition: Myopia
Intervention: Other: accommodative/vergence therapy
30 Recruiting An Evaluation of LASIK and PRK Surgery in Physicians
Conditions: Nearsightedness;   Farsightedness;   Astigmatism
Intervention: Behavioral: Questionnaire (QoV questionnaire)
31 Recruiting High Resolution Wavefront-guided vs. Wavefront Optimized LASIK
Conditions: Nearsightedness;   Astigmatism
Intervention: Procedure: LASIK
32 Recruiting Early Changes Among FLEx, LASIK and FS-LASIK
Conditions: Myopia;   Astigmatism
Interventions: Procedure: lenticule extraction;   Procedure: laser in situ keratomileusis;   Procedure: FS assisted laser in situ keratomileusis
33 Recruiting Changes Between Lenticule Extraction and Femtosecond Laser-assisted Laser in Situ Keratomileusis
Conditions: Myopia;   Astigmatism
Interventions: Procedure: lenticule extraction;   Procedure: femtosecond laser-assisted laser in situ keratomileusis
34 Not yet recruiting Echothiophate Iodide for the Prevention of Progression of Myopia
Condition: Myopia
Interventions: Drug: Echothiophate Iodide 0.03% Ophthalmic Solution;   Drug: Carboxymethylcellulose Sodium (0.5%)
35 Recruiting Investigation of AcrySof® IQ PanOptix™ Presbyopia-Correcting Intraocular Lens (IOL) Model TFNT00
Condition: Cataract
Intervention: Device: AcrySof® IQ PanOptix™ Presbyopia-Correcting IOL
36 Recruiting Conventional Surgery vs. Verion/VerifEye
Conditions: Cataract;   Astigmatism
Interventions: Device: Conventional;   Device: Verion
37 Recruiting Clinical Evaluation of the Lenstec SBL-3 Multifocal Intraocular Lens
Conditions: Cataracts;   Presbyopia
Interventions: Device: SBL-3 multifocal intraocular lens;   Device: Control monofocal intraocular lens
38 Not yet recruiting Scleral Versus Corneal RGP Contact Lenses in Irregular Cornea Disorders
Conditions: Irregular; Contour of Cornea;   Keratoconus;   Pellucid Marginal Corneal Degeneration;   Injury of Cornea;   Irregular Astigmatism
Interventions: Device: Scleral rigid gas permeable contact lenses (Zenlens™);   Device: Corneal lenses (Rose K2)
39 Recruiting Presbyopia Compensation: Looking for Electrophysiological Predictors
Condition: Presbyopia
Intervention: Device: contact lenses
40 Recruiting Inherited Retinal Degenerative Disease Registry
Conditions: Eye Diseases Hereditary;   Retinal Disease;   Achromatopsia;   Bardet-Biedl Syndrome;   Bassen-Kornzweig Syndrome;   Batten Disease;   Best Disease;   Choroidal Dystrophy;   Choroideremia;   Cone Dystrophy;   Cone-Rod Dystrophy;   Congenital Stationary Night Blindness;   Enhanced S-Cone Syndrome;   Fundus Albipunctatus;   Goldmann-Favre Syndrome;   Gyrate Atrophy;   Juvenile Macular Degeneration;   Kearns-Sayre Syndrome;   Leber Congenital Amaurosis;   Refsum Syndrome;   Retinitis Pigmentosa;   Retinitis Punctata Albescens;   Retinoschisis;   Rod-Cone Dystrophy;   Rod Dystrophy;   Rod Monochromacy;   Stargardt Disease;   Usher Syndrome
Intervention:

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Indicates status has not been verified in more than two years