Results 211 to 220 of about 1,707,949 (259)

Effect of Ibuprofen on Contrast Sensitivity

Optometry and Vision Science, 1992
ABSTRACT Therapeutic doses of ibuprofen (2‐4'‐isobutylphenylpropionic acid) have been shown to have many deleterious effects on the nervous system. However, visual disturbances have been reported in fewer than 1% of the patients taking recommended doses of ibuprofen.
W H, Ridder, A, Tomlinson
openaire   +2 more sources

Contrast sensitivity in radial keratotomy

Acta Ophthalmologica, 1991
Abstract In a prospective study, contrast sensitivity function was determined before and one month post‐surgery in 15 consecutive cases of radial keratotomy. The results obtained pre‐operatively were compared to those of an age‐matched, emmetropic reference group also comprising 15 persons. Three different test conditions were employed.
H, Olsen, J, Andersen
openaire   +2 more sources

Iodinated contrast sensitivity in ERCP

The American Journal of Gastroenterology, 2000
Iodine 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.
P, Draganov, P B, Cotton
openaire   +2 more sources

Myopia and contrast sensitivity function

Current Eye Research, 2001
to 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 ...
S W, Liou, C J, Chiu
openaire   +2 more sources

Contrast sensitivity in Parkinson's disease

Neurology, 1986
We 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, J D, Meerwaldt, G J, van der Wildt, C J, Keemink   +3 more
openaire   +2 more sources

CONTRAST SENSITIVITY IN MONOCULAR GLAUCOMA

Acta Ophthalmologica, 1983
The results of this selected group of glaucoma patients demonstrate that the effect of glaucoma on the contrast sensitivity can be assessed only after careful exclusion of all other causes for decrease in contrast sensitivity. Further development of methods is necessary.
L, Hyvärinen, J, Rovamo, P, Laurinen, J, Saarinen, R, Näsänen   +4 more
openaire   +2 more sources

Transient sensitization by a contrast flash

Vision Research, 1980
Abstract A large, annular contrast-flash that raises thresholds for a test spot under some conditions can lower theresholds under other conditions. Incremental thresholds for a 2.5° test flash were measured upon a 10° adapting field. When an annulus, 2.5–9°, was flashed shortly before or shortly after presentation of the test spot, threshold was ...
E, Pulos, J E, Raymond, W, Makous
openaire   +2 more sources

Contrast Sensitivity and Increment Threshold

Perception, 1972
The threshold of rectangular and annular increments was established on square-wave gratings of 1 foot lambert mean luminance. In the range of 5–18 cycles/degree the threshold fell as the spatial frequency of the background increased. The threshold change was similar for rectangles and annuli, but the exponent of the curve differed according to the ...
openaire   +2 more sources

Spatiotemporal separability in contrast sensitivity

Vision Research, 1994
Contrast 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 ...
J, Yang, W, Makous
openaire   +2 more sources

Contrast sensitivity in diabetic pregnancy

Graefe's Archive for Clinical and Experimental Ophthalmology, 1997
To evaluate the correlation between the changes in contrast sensitivity and retinopathy throughout pregnancy in diabetic women with mild background diabetic retinopathy.Contrast sensitivity (Vistech 6500 Contrast Test System) was measured in 22 type I diabetic women with mild background retinopathy [0-16 microaneurysms (MAs)/eye and occasional small ...
T, Hellstedt, R, Kaaja, K, Teramo, I, Immonen   +3 more
openaire   +2 more sources