View clinical trials related to Refractive Errors.
Filter by:The purpose of this Post-Market Clinical Follow-Up (PMCF) study is to assess long term performance and safety of Air Optix Aqua Sphere, Air Optix plus HydraGlyde Sphere, and Air Optix plus HydraGlyde Toric soft contact lenses in a real-world setting when worn as extended (overnight) wear.
Corrective eye surgeries, such as Lasik, are widely used to correct focusing problems such as myopia, or nearsightedness. Often these patients develop other conditions like myopic maculopathy or glaucoma which require monitoring with optical coherence tomography (OCT). Since OCT is a light-based test and changes the refractive status of the eye (in the cornea or the lens), it can potentially affect the results of the OCT measurements but has not been sufficiently studied. This pilot study aims at studying the potential change in OCT parameters in the eye after undergoing such surgery.
The present research process is a prospective, non-interventional clinical study that will be conducted -under the auspices of the Democritus University of Thrace (DUTH)- in the pre-school students of the city of Alexandroupolis, Greece. - The study aims to assess the visual acuity of the kindergarten students. - The measurement of monocular best-spectacle corrected visual acuity will be performed using a web-based visual acuity chart
The purpose of this Post-Market Clinical Follow-Up (PMCF) study is to assess long term performance and safety of Air Optix Aqua, Air Optix plus HydraGlyde Sphere, and Air Optix plus HydraGlyde Toric soft contact lenses in a real-world setting when worn as daily wear.
The purpose of this study is to compare the fit characteristics between four Alcon commercially available toric contact lenses.
The purpose of this study is to assess long term performance and safety of AONDA in a real world setting when worn as daily wear or continuous wear for vision correction. This study will be used to support AONDA's marketability in Europe and other locations.
The study aim to determine the prevalence of refractive errors in primary school children aged 6-12 in The New Valley , Egypt .
The purpose of this study is to assess the clinical performance of two reusable silicone hydrogel contact lenses when worn on a daily wear basis.
The purpose of this clinical trial was to evaluate the clinical performance of a manufacturing process on a frequent replacement multifocal contact lens.
Identification of the correlation between angle kappa , corneal high order aberrations and total eye aberrations in myopic hyperopic and astigmatic patients