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1984
The contrast sensitivity function is a normalised description of a system’s sensitivity to spatial frequencies in terms of the contrast required to perform some perceptual task. For detection tasks, the human C.S.F. peaks at around 3–5 cycles/deg and reaches zero at about 60 cycles/deg. See modulation transfer function .
Alan Bundy, Lincoln Wallen
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The contrast sensitivity function is a normalised description of a system’s sensitivity to spatial frequencies in terms of the contrast required to perform some perceptual task. For detection tasks, the human C.S.F. peaks at around 3–5 cycles/deg and reaches zero at about 60 cycles/deg. See modulation transfer function .
Alan Bundy, Lincoln Wallen
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Transient sensitization by a contrast flash
Vision Research, 1980Abstract 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 ...
Walter Makous +2 more
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Contrast sensitivity in radial keratotomy
Acta Ophthalmologica, 1991Abstract 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.
Hanne Olsen, Jørgen Goul Andersen
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Effect of Ibuprofen on Contrast Sensitivity
Optometry and Vision Science, 1992Therapeutic doses of ibuprofen (2-4'-isobutylphenyl-propionic 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.
Alan Tomlinson, William H. Ridder
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Contrast sensitivity of optokinetic nystagmus
Vision Research, 1991To determine the threshold characteristics of optokinetic nystagmus (OKN), contrast thresholds for involuntary OKN were measured for gratings of different spatial frequency to yield an OKN-contrast sensitivity function (OKN-CSF). The OKN-CSF resembled an inverted U-shaped function with temporal-to-nasal and nasal-to-temporal movement yielding similar ...
G.L. Rogers +5 more
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CONTRAST SENSITIVITY IN MONOCULAR GLAUCOMA
Acta Ophthalmologica, 1983The 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.
Jyrki Rovamo +4 more
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Photoacoustic Imaging: Contrast Agents and Their Biomedical Applications
Advances in Materials, 2018Photoacoustic (PA) imaging as a fast‐developing imaging technique has great potential in biomedical and clinical applications. It is a noninvasive imaging modality that depends on the light‐absorption coefficient of the imaged tissue and the injected PA ...
Qinrui Fu +4 more
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Contrast Sensitivity and Glaucoma
1983In the past, our clinical methods of testing vision in glaucoma have, for the most part, been limited to routine light-sense perimetry in which we measure differential lights sensitivity at selected loci in the field of vision. Such testing has disclosed that glaucomatous impairment of light sensitivity usually begins in the paracentral and nasal ...
C. D. Phelps, M. A. Motolko
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Optica Acta: International Journal of Optics, 1977
Like the modulation transfer function of man-made imaging devices, the contrast sensitivity of the human eye can be measured with sinusoidal grating targets of various spatial frequencies. Criterion-free psychophysical methods permit us to regard the contrast sensitivity as a direct measure of the subject's visual performance, independent of subjective
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Like the modulation transfer function of man-made imaging devices, the contrast sensitivity of the human eye can be measured with sinusoidal grating targets of various spatial frequencies. Criterion-free psychophysical methods permit us to regard the contrast sensitivity as a direct measure of the subject's visual performance, independent of subjective
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