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Published on BioPortfolio: 2018-02-22T19:05:23-0500
A multi-centre non-randomized clinical investigation to assess multifocal visual outcomes using different near additions, for the treatment of aphakia after cataract removal.
Nurses participate to geriatric evaluations for falling patients. For these patients, it is recommended to evaluate,especially, visual acuity but this is not currently done because it is d...
This study involves the use of VisionQuest 20/20 which is a new software program to test visual acuity in children. The purpose of this study is to compare the results of VisionQuest 20/2...
The goal of this randomized clinical trial is to investigate when it is optimal to treat the eye disease epiretinal fibrosis. Hypothesis: In a population of patients with symptomatic idio...
The purpose of this multi-center clinical trial is to determine the safety and efficacy of the HSO Toric IOLs for the correction of aphakia and reduction of pre-existing refractive astigma...
To determine effect sizes for visual acuity (VA) and visual acuity gain (ΔVA, pre- to postoperative) after the implantation of retroiridal Verisyse iris-claw lenses.
The aim of this study was (i) to evaluate the visual performance of dental hygienists in their clinical environment and (ii) to analyse the relationship between self-assessed and objectively measured ...
To use eye movement recordings of young children to determine whether eye velocity from infantile nystagmus (IN) deprives the developing visual system of normal visual acuity.
Vernier and grating acuity can be measured with swept-parameter visual evoked potentials (sVEP). However, whether sVEP Vernier and grating acuities are comparable in predicting letter acuity has not b...
Sweep visual evoked potentials (sVEPs) provide an implicit, objective, and sensitive evaluation of low-level visual functions such as visual acuity and contrast sensitivity. For practical and traditio...
Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.
Visual impairments limiting one or more of the basic functions of the eye: visual acuity, dark adaptation, color vision, or peripheral vision. These may result from EYE DISEASES; OPTIC NERVE DISEASES; VISUAL PATHWAY diseases; OCCIPITAL LOBE diseases; OCULAR MOTILITY DISORDERS; and other conditions. Visual disability refers to inability of the individual to perform specific visual tasks, such as reading, writing, orientation, or traveling unaided. (From Newell, Ophthalmology: Principles and Concepts, 7th ed, p132)
The functional superiority and preferential use of one eye over the other. The term is usually applied to superiority in sighting (VISUAL PERCEPTION) or motor task but not difference in VISUAL ACUITY or dysfunction of one of the eyes. Ocular dominance can be modified by visual input and NEUROTROPHIC FACTORS.
Absence of crystalline lens totally or partially from field of vision, from any cause except after cataract extraction. Aphakia is mainly congenital or as result of LENS DISLOCATION AND SUBLUXATION.
The ability to detect sharp boundaries (stimuli) and to detect slight changes in luminance at regions without distinct contours. Psychophysical measurements of this visual function are used to evaluate visual acuity and to detect eye disease.