Results 271 to 280 of about 8,270,013 (310)

Functional visual streams

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 Importance of the Phase Transfer Function to Visual Function and Visual Quality Metrics

Journal of Refractive Surgery, 2004
<p>ABSTRACT</p><p>PURPOSE: To propose a vision quality metric that directly incorporates the phase transfer function.</p><p>METHODS: The process of retinal image formation from the pupil to the retina is presented to identify possible domains for calculating vision quality metrics.
Edwin J, Sarver, Raymond A, Applegate
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Functional Visual Loss in Children

Ophthalmology, 1986
Twenty-three children (16 girls, 7 boys, aged 6-17 years) who presented with the specific complaint of blurred vision were diagnosed as having functional visual loss. Symptoms were intermittent in seven children. Associated signs and symptoms were common and included headaches, visual field loss, diplopia, micropsia, voluntary nystagmus, and spasm of ...
R A, Catalono, J W, Simon, G B, Krohel, P N, Rosenberg   +3 more
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The Visual Function of the Vitamins A

1961
Publisher Summary The retinas of most vertebrate eyes possess two kinds of light receptor: rods, for vision in dim light, and cones, for vision in bright light and for color vision. Each of these organs contains a photosensitive pigment, which bleaches on exposure to light. Some aspect of this process leads to a nervous excitation, which, transmitted
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Modification of visual function by early visual experience

Bulletin der Schweizerischen Akademie der Medizinischen Wissenschaften, 1976
Physiological experiments, involving recording from the visual cortex in young kittens and monkeys, have given new insight into human developmental disorders. In the visual cortex of normal cats and monkeys most neurones are selectively sensitive to the orientation of moving edges and they receive very similar signals from both eyes. Even in very young
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Visual function thresholds in children

Current Eye Research, 2000
The aim of the present study was to establish a range of values for individual visual function measurements in Primary 1 schoolchildren.93 visually normal children with a mean age of 5.4 +/- 0.3 years were recruited with parental consent. Measures of visual acuity obtained included 1) High Contrast (CAT) 2) Low Contrast (LC) 3) Single Letter (SLA) and ...
A J, Simmers, L S, Gray, B, Winn
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Visual functions and functional vision

International Congress Series, 2005
Abstract 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.
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Photophysiological functions of visual pigments

Advances in Biophysics, 1984
In order to gain a fundamental understanding of functions of a visual pigment, i.e., photoreception and phototransduction, it is essential to elucidate the molecular structure of visual pigment, its photochemical behavior and connection of the pigment to the molecular physiological amplification mechanism for excitation of a visual cell. A rhodopsin, a
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Visualization of heart function

ACM SIGGRAPH 2004 Sketches on - SIGGRAPH '04, 2004
Vassilios Hurmusiadis, Nicholas Clifford, Chris Briscoe   +2 more
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Assessment of visual function

2007
DAVID B. ELLIOTT, JOHN FLANAGAN
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