Results 321 to 330 of about 8,469,152 (382)
Some of the next articles are maybe not open access.
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
openaire +2 more sources
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
openaire +2 more sources
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
openaire +3 more sources
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
openaire +2 more sources
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
openaire +2 more sources
Contrast sensitivity in Parkinson's disease
Neurology, 1986We studied contrast-sensitivity function in 39 patients with Parkinson's disease. Sixty-four percent of the patients showed contrast-sensitivity loss in one or both eyes. The abnormality was not related to the first symptom or the severity of disease.
C. Bulens +3 more
openaire +2 more sources
Iodinated contrast sensitivity in ERCP
The American Journal of Gastroenterology, 2000Iodine contrast media are detectable in the bloodstream after ERCP, and sensitivity reactions have been described. The risk is very small, and the phenomenon is therefore difficult to study. This review discusses the possible need for preventative strategies, and recommends that endoscopists consider the issue and define their own policies.
Peter B. Cotton, Peter V. Draganov
openaire +3 more sources
Myopia and contrast sensitivity function
Current Eye Research, 2001to measure the contrast sensitivity function of varying degrees of myopia with two types of optical correction (spectacle lens and contact lens).One hundred and five myopic eyes and twenty-eight emmetropic eyes were collected. The myopic group included 105 eyes corrected with spectacle lenses and 71 eyes of them corrected with contact lenses, too; all ...
Cheng-Jen Chiu, Shiow-Wen Liou
openaire +3 more sources
1989
The detection of small luminance differences between objects and their backgrounds is an important tool for navigating in the visual environment. Many visual system disorders cause patients to complain that their vision is cloudy or blurred, or that the borders of objects are blurred, even though they retain 20/20 Snellen acuity.
Mark J. Kupersmith +2 more
openaire +2 more sources
The detection of small luminance differences between objects and their backgrounds is an important tool for navigating in the visual environment. Many visual system disorders cause patients to complain that their vision is cloudy or blurred, or that the borders of objects are blurred, even though they retain 20/20 Snellen acuity.
Mark J. Kupersmith +2 more
openaire +2 more sources
Spatiotemporal separability in contrast sensitivity
Vision Research, 1994Contrast sensitivity functions were measured in two ways: by counterphase modulation; and by in-phase modulation, in which the luminance of every point of a spatial grating was sinusoidally modulated in phase with one another. Contrast sensitivity functions measured by counterphase modulated gratings show spatiotemporal interactions that represent ...
Walter Makous, Jian Yang
openaire +3 more sources