View clinical trials related to Vision Disorders.
Filter by:This study is a multi-site, 5-visit dispensing, bilateral double-arm parallel group design, double-masked clinical trial using an investigational contact lens and a marketed contact lens. The objective is to evaluate comfort of the contact lenses when worn on a daily wear modality.
This clinical trials aims to evaluate Tests Performance on a New Digital Orthoptic Platform.
This is a multi-site, dispensing, 4-visit, 2-arm parallel group, randomized, double-masked clinical trial using a Vistakon investigational contact lens (test) and a marketed monthly replacement contact lens (control). Each subject will be assigned randomly to either the test or control lens to evaluate the long term safety and efficacy of the investigational contact lens compared to the marketed contact lens over a period of six months of lens wear.
The Baltimore Reading and Eye Disease Study (BREDS) is a two year study to determine the prevalence of vision problems in an early school age population with reading difficulty. Comprehensive vision and reading tests will be administered to 400 students at participating schools in the Baltimore City Public School system. A secondary goal is to examine the impact of vision treatment on reading performance. Children with refractive error or convergence insufficiency will be provided treatment free of charge. The investigators will evaluate the impact that the treatment has on vision function and reading performance.
The purpose of this investigation is to evaluate the short-term, clinical performance of two silicone hydrogel daily disposable contact lenses.
Visual disorders are often overlooked in the treatment of cognitive disorders of the elderly. Yet the visual deficit impacts the quality of life, the evolution of the autonomy and psycho-behavioral disorders in cognitive diseases. The main objective of the study is to evaluate the prevalence of visual disorders among elderly patients at consultant outpatient center of Nantes clinical gerontology as part of the consultation geriatric memory. Secondary objectives are to describe ophthalmological diseases detected and taken into the proposed ophthalmic load, to determine if there are associations between eye diseases and cognitive disorders, to estimate the proportion of patients who may have an ophthalmologic evaluation to determine the cognitive profiles and geriatric evaluation and ocular pathological, depending on the assessment of arterial stiffness. The results of this study will build a testing strategy to promote access of older patients with cognitive impairment to vision care.
This study is a prospective, randomized, double-masked, bilateral, dispensing, parallel-group clinical trial design. All subjects will participate in a 2-week daily disposable contact lens adaptation period prior to being randomized into one of the four extended wear lenses. The study has a total of 9 scheduled study visits and a total duration of ~197 days. The lenses will be replaced with a fresh pair after 6 nights / 7 days of wear.
This is a pilot evaluation to assess the feasibility of using novel imaging process to characterize lens edge and limbal epithelial thickness profile; lens movement with gaze and blink; and conjunctival microvasculature including fractal analysis of microvascular perfusion maps and blood flow velocity.
This study will highlight differences in cortical activation between asymptomatic and symptomatic patients.
The transient visual disturbances (TVD) are defined by a short abnormality of visual function. Their etiology may be ophthalmological, neurological non-ischemic or of ischemic origin. The difficulty is to recognize an ischemic mechanism which imposes emergency cares. A clinical score could help the clinician to recognize the etiology of the TVD .