Results 211 to 220 of about 573,259 (262)
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2022
Inherited retinal diseases (IRDs), including retinitis pigmentosa, have devastating consequences for the visual function of affected individuals. Chief among these are a gradual loss of visual field, visual acuity, and night vision (otherwise known as nyctalopia). These changes often occur slowly, over a course of decades.
Ritah, Chumdermpadetsuk +2 more
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Inherited retinal diseases (IRDs), including retinitis pigmentosa, have devastating consequences for the visual function of affected individuals. Chief among these are a gradual loss of visual field, visual acuity, and night vision (otherwise known as nyctalopia). These changes often occur slowly, over a course of decades.
Ritah, Chumdermpadetsuk +2 more
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Visual Acuity as a Measurement of Visual Function
2022Visual acuity (VA) is a traditional measure of central visual function, particularly the ability of the eye to perceive details. In a clinical setting, standardized charts are commonly used to quickly assess VA. Namely, the Early Treatment of Diabetic Retinopathy Study (ETDRS) VA test chart is the gold standard for VA testing in the clinical setting ...
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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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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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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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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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Visualizing functions on a surface
The Journal of Visualization and Computer Animation, 1991AbstractWe describe techniques for the visualization of a scalar‐valued function defined over a surface. The main interest focuses on a 4D graph of such a function and projections of this graph into 3‐space. The paper also contains methods for testing the smoothness of interpolants over surfaces and a short tutorial on fundamental ideas of ...
Helmut Pottmann +2 more
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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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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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Visual functions and functional vision
International Congress Series, 2005Abstract ICF and ICIDH recognize various aspects of vision loss. Within this framework we use the term Visual functions to describe how well the eye and visual system function; functional vision is used to describe how well the person functions in vision-related activities.
exaly +2 more sources