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Visual Function Tests: Visual Fields
2022Visual field tests, also known as perimetry tests, are used to assess progression of ophthalmic diseases such as retinitis pigmentosa (RP) by monitoring changes in a patient's visual field (VF). VF loss corresponds to damage at any point in the visual pathway, including the retina, such as in RP. Damage to different parts of this pathway corresponds to
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Current Opinion in Neurology, 2017
Purpose of review Functional visual loss (FVL) is a syndrome in which subjective visual parameters are inconsistent with objective measures. Recent advances in understanding the pathophysiology and management of functional disorders and FVL will be explored.
Shanil, Dhanji, Mitchell, Lawlor
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Purpose of review Functional visual loss (FVL) is a syndrome in which subjective visual parameters are inconsistent with objective measures. Recent advances in understanding the pathophysiology and management of functional disorders and FVL will be explored.
Shanil, Dhanji, Mitchell, Lawlor
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2016
This chapter discusses the anatomic basis of the visual functions, and symptoms and signs caused by its impairment, and representative diseases or syndromes presenting with visual disturbance. How much detail of visual acuity should be measured depends on the tentative diagnosis based on the history taking and on the clinical set-up in the hospital. At
Hiroshi Shibasaki, Mark Hallett
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This chapter discusses the anatomic basis of the visual functions, and symptoms and signs caused by its impairment, and representative diseases or syndromes presenting with visual disturbance. How much detail of visual acuity should be measured depends on the tentative diagnosis based on the history taking and on the clinical set-up in the hospital. At
Hiroshi Shibasaki, Mark Hallett
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American Journal of Ophthalmology, 1985
Patients with functional loss of visual acuity or visual fields range from the "deliberate malingerer" to the "suggestible innocent." Between these extremes are patients with varying mixtures of fraud and suggestibility. These patients do not, as a rule, have psychiatric disease and do not need to see a psychiatrist. The ophthalmologist must be able to
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Patients with functional loss of visual acuity or visual fields range from the "deliberate malingerer" to the "suggestible innocent." Between these extremes are patients with varying mixtures of fraud and suggestibility. These patients do not, as a rule, have psychiatric disease and do not need to see a psychiatrist. The ophthalmologist must be able to
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Visual Function in Neurofibromatosis
Journal of Neuro-Ophthalmology, 1996To evaluate the visual function in patients with neurofibromatosis (NF) and to study the etiology and incidence of visual dysfunction associated with NF.A total of 75 patient with diagnostic criteria for NF were evaluated. Neuro-ophthalmological examination as well as electrophysiological and imaging studies were performed.
A, Castanheira-Dinis +5 more
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Visual Function Assessment Questionnaires
Survey of Ophthalmology, 2001With increased emphasis on functional outcomes in ophthalmology, third-party health care payers and research funding agencies have turned their attention to the development and use of visual function questionnaires. Since 1980, more than a dozen such self-report visual function questionnaires have been developed.
R W, Massof, G S, Rubin
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Current Biology, 1992
The idea that visual signals relayed by the parvocellular and magnocellular subdivisions of the lateral geniculate nucleus remain segregated in the cerebral cortex has attracted considerable attention. It has been proposed that parvocellular contributions dominate in the temporal visual cortex, and that magnocellular contributions dominate in the ...
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The idea that visual signals relayed by the parvocellular and magnocellular subdivisions of the lateral geniculate nucleus remain segregated in the cerebral cortex has attracted considerable attention. It has been proposed that parvocellular contributions dominate in the temporal visual cortex, and that magnocellular contributions dominate in the ...
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2022
This chapter describes various methods of the assessment of visual function used for assessing disease progression and treatment response in patients with retinitis pigmentosa (RP). These methods include full-field stimulus testing (FST), near-infrared autofluorescence (NIR-AF), quantitative fundus autofluorescence (qAF), and quantitative near-infrared
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This chapter describes various methods of the assessment of visual function used for assessing disease progression and treatment response in patients with retinitis pigmentosa (RP). These methods include full-field stimulus testing (FST), near-infrared autofluorescence (NIR-AF), quantitative fundus autofluorescence (qAF), and quantitative near-infrared
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Physiologic functional imaging in “functional” visual loss
Survey of Ophthalmology, 1996Neuroimaging with nuclear medicine techniques permits assessment of brain function by measurement of metabolism or blood flow. Such studies complement the anatomic information derived from computed tomography (CT) or magnetic resonance imaging (MRI).
Jonathan Wirtschafter +3 more
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Visualizing Nonlinear Implicit Functions
Civil-Comp Proceedings, 2012This paper describes a novel procedure for visualization (contouring) of implicit functions. It is based on a combination of the Newton algorithm and the ‘arc-length’ method. The new procedure has many advantages e.g. alleviates the singularity problem of the Newton algorithm.
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