Results 141 to 150 of about 2,687 (164)

Prediction of higher visual function in macular degeneration with multifocal electroretinogram and multifocal visual evoked potential

Ophthalmic and Physiological Optics, 2014
Abstract Objective Visual search can be guided by past experience of regularities in our visual environment. This search guidance by contextual memory cues is impaired by foveal vision loss. Here we compared retinal and cortical visually evoked responses in their predictive value for contextual
Herbik, Anne, Geringswald, Franziska, Thieme, Hagen, Pollmann, Stefan, Hoffmann, Michael   +4 more
openaire   +2 more sources

The diagnostic significance of the multifocal pattern visual evoked potential in glaucoma

Current Opinion in Ophthalmology, 1999
The concept of objective perimetry is an exciting one because it strives to assess glaucoma damage without relying on psychophysical testing. The recent introduction of multifocal stimulus recording has enhanced our ability to examine the human visual field using electrophysiology.
S L, Graham, A, Klistorner
openaire   +2 more sources

Multifocal Visual-Evoked Potentials in Patients With Schizophrenia During Treatment

Acta Neuropsychiatrica, 2011
Aim: Investigation of responses of multifocal visual-evoked potentials (mfVEPs) in schizophrenic patients under treatment in whom no abnormality was detected on the conventional perimetry.Methods: Recordings of mfVEPs were performed in 31 schizophrenic patients and 30 normal subjects using a VERIS Junior Science recording apparatus (Mayo, Aichi, Japan).
Eiichi Yukawa, Futoshi Taketani, Yoshiaki Hara   +2 more
exaly   +3 more sources

Exploring the methods of data analysis in multifocal visual evoked potentials

Documenta Ophthalmologica, 2016
The multifocal visual evoked potential (mfVEP) provides a topographical assessment of visual function, which has already shown potential for use in patients with glaucoma and multiple sclerosis. However, the variability in mfVEP measurements has limited its broader application.
Malmqvist, Lasse, Santiago de Abreu, Lucimar, Fraser, C., Klistorner, Alexander, Hamann, S.   +4 more
openaire   +3 more sources

Effect of stimulus check size on multifocal visual evoked potentials

Documenta Ophthalmologica, 2003
In this study we examined the effects of varying stimulus check size on multifocal visual evoked potential (VEP). We also evaluated the currently used cortical scaling of stimulus segments. The ObjectiVision multifocal objective perimeter stimulates the eye with random check patterns at 56 cortically scaled segments within the visual field extending to
Chandra, Balachandran, Alexander I, Klistorner, Stuart L, Graham   +2 more
openaire   +2 more sources

Effect of blue-light filtering on multifocal visual-evoked potentials

Journal of Cataract and Refractive Surgery, 2012
To perform an objective functional assessment of the impact of blue-light filters on cortical processing to evaluate the potential side effects of the filters on higher tier visual function at the neural level.Department of Ophthalmology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany.Cohort study.Multifocal pattern-reversal visual-evoked ...
Michael B, Hoffmann, Wolfgang, Behrens-Baumann, Achim, Langenbucher, Juliane, Reupsch, Arne, Viestenz   +4 more
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Determining abnormal interocular latencies of multifocal visual evoked potentials

Documenta Ophthalmologica, 2004
To describe methods for measuring interocular latency differences of multifocal visual evoked potentials (mfVEP) and for determining regions with abnormal interocular latencies in patients.The mfVEPs from 100 individuals with normal visual fields and normal fundus examinations were analyzed. Individuals ranged in age from 21.6 to 92.4 years.
Donald C, Hood, Xian, Zhang, Christopher, Rodarte, E Bo, Yang, Nitin, Ohri, Brad, Fortune, Chris A, Johnson   +6 more
openaire   +2 more sources

Low-contrast multifocal visual evoked potentials

Neurology, 2012
For 40 years, visual evoked cortical potentials (VEPs) have been used to aid in the diagnosis of demyelinating optic neuropathy.1 Early studies demonstrated an increased latency of the positive peak normally seen at about 100 msec—the P100—in patients with optic neuritis.1 Since the P100 often remains prolonged following recovery from the acute episode,
Matthew J, Thurtell, Steven L, Galetta
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Investigating Visual Function with Multifocal Visual Evoked Potentials

2007
■ With multifocal visual evoked potentials (mfVEPs) the visual field can be sampled for response abnormalities. Thus, mfVEPs open the possibility of an objective visual field test. The issue, however, is greatly complicated by the variability of the responses across the visual field and between subjects.
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Other Tests in Glaucoma: Multifocal Visual Evoked Potential

2009
Numerous electrophysiological tests have been proposed for detecting glaucomatous damage. Some involve electrical recordings from the eye, while others involve recordings from the cortex [1]. The focus of this chapter is on the latter, particularly the VEP, an electrical potential recorded with one or more electrodes placed over the occipital region of
Donald C. Hood, Robert Ritch
openaire   +1 more source