Results 261 to 270 of about 8,270,013 (310)
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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 presynaptic function
Nature Neuroscience, 2013Synaptic communication in the nervous system is initiated by the fusion of synaptic vesicles with the presynaptic plasma membrane and subsequent neurotransmitter release. In the 1980s, this process was characterized by electron microscopy, albeit without the ability to follow processes in living cells.
Ege T, Kavalali, Erik M, Jorgensen
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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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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 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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Visualizing transcendental functions
Computing in Science & Engineering, 2000Scientists and engineers often need to compute mathematical functions that depend in a complicated way on their parameters. Such functions-especially those whose analytical properties researchers have studied extensively-are called transcendental functions or special functions. There are three important reasons for visualizing such functions: to better
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American journal of optometry and archives of American Academy of Optometry, 1968
Abstract The problem of the seriously retarded reader is examined to determine the role of vision. The most obvious visual factors, such as acuity and refractive error, do not seem related to the problem.
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Abstract The problem of the seriously retarded reader is examined to determine the role of vision. The most obvious visual factors, such as acuity and refractive error, do not seem related to the problem.
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