Results 281 to 290 of about 6,621,534 (346)
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Contrast sensitivity in children
Vision Research, 1982We have used a spatial two-alternative, forced-choice staircase technique to measure contrast sensitivities for sinusoidally modulated gratings. Subjects, all of whom were untrained observers, consisted of children of ages 2-16 yr and adults. Our testing method was completely successful with children who were over 3.5 yr but failed with those below 2.5
Ralph D. Freeman, Arthur Bradley
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Contrast sensitivity in dyslexia
Visual Neuroscience, 1995AbstractContrast sensitivity was determined for dyslexic and normal readers. When testing with temporally ramped (i.e. stimuli with gradual temporal onsets and offsets) gratings of 0.6, 4.0, and 12.0 cycles/deg, we found no difference in contrast sensitivity between dyslexic readers and controls.
Mark T. Dunbar +11 more
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Ophthalmology Clinics of North America, 2003
Spatial contrast is a physical dimension referring to the light-dark transition of a border or an edge in an image that delineates the existence of a pattern or an object. Contrast sensitivity refers to a measure of how much contrast a person requires to see a target.
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Spatial contrast is a physical dimension referring to the light-dark transition of a border or an edge in an image that delineates the existence of a pattern or an object. Contrast sensitivity refers to a measure of how much contrast a person requires to see a target.
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Radiology, 2022
Background Contrast-enhanced mammography (CEM) is a more accessible alternative to contrast-enhanced MRI (CE-MRI) in breast imaging, but a summary comparison of published studies is lacking.
Nina Pötsch +4 more
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Background Contrast-enhanced mammography (CEM) is a more accessible alternative to contrast-enhanced MRI (CE-MRI) in breast imaging, but a summary comparison of published studies is lacking.
Nina Pötsch +4 more
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Jogging and contrast sensitivity
Acta Ophthalmologica, 1988Abstract. Threshold contrast sensitivity was measured using sinusoidal gratings with the method of increasing contrast both before and after jogging in fresh air. The mean contrast sensitivity of 11 subjects was higher after jogging at all three spatial frequencies studied (1, 6 and 19 c/deg). The differences were statistically significant. The effect
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Contrast sensitivity in asymmetric glaucoma
International Ophthalmology, 1984We measured central contrast sensitivity in both eyes of 27 patients with asymmetric glaucomatous visual field loss or optic disc cupping. In 15 patients contrast sensitivity was less in the eye that by perimetry or ophthalmoscopy was the more severely damaged. In 10 patients contrast sensitivity was the same in the two eyes.
Michael Motolko, Charles D. Phelps
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Contrast sensitivity is associated with frailty
European Geriatric Medicine, 2021Using data from the Malaysian Elders Longitudinal Research (MELoR), this study investigated the association between visual function (visual acuity and contrast sensitivity) and frailty in a group of urban-dwelling older adults.This was a cross-sectional study.
Nurul Najieha Amir +7 more
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Evaluating contrast sensitivity
SPIE Proceedings, 2006The problem for proper rendering of spatial frequencies in digital imaging applications is to establish the relative contrast sensitivity of observers at suprathreshold contrast levels in typical viewing environments. In an experimental study two methods of evaluating spatial contrast sensitivity were investigated, using targets of graded tonal ...
Lindsay W. MacDonald +2 more
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Effect of pterygium on contrast sensitivity [PDF]
International Ophthalmology, 2013 The purpose of this study is to evaluate the effect of pterygium on contrast sensitivity. Thirty-six eyes with pterygium and 18 eyes without pterygium were included in the study. The size of the pterygium was measured on the slit lamp both vertically at the limbus and categorized into three groups (≤3, 3.1 to ≤5, >5 mm), and horizontally on the cornea ...
Sudesh Kumar Arya +4 more
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