Results 251 to 260 of about 4,603,420 (293)
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Aliasing and contrast sensitivity in peripheral vision
Annual Meeting Optical Society of America, 1988Resolution acuity is often conceived as that spatial frequency for which contrast sensitivity fails to unity. We suspect this is not the case for peripheral vision because recent experiments have shown that peripheral resolution is limited by the ambiguity introduced by aliasing, not by an inability to detect the stimulus.1,2 Since gratings beyond the ...
Larry N. Thibos, D. L. Still
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Sensitivity to spatiotemporal colour contrast in the peripheral visual field
Vision Research, 1983Contrast detection thresholds for spatiotemporal colour modulation were determined at several retinal locations. Colour discrimination is studied for red-green modulation of a yellow field and for yellow-blue modulation of a white field. For constant target size colour vision deteriorates if the stimulus is moved away from the fovea, but if the shift ...
C, Noorlander +3 more
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Temporal Integration and Contrast Sensitivity in Foveal and Peripheral Vision
Perception, 1984Spatial contrast sensitivity functions and temporal integration functions for gratings with dark surrounds were measured at various eccentricities in photopic vision. Contrast sensitivity decreased with increasing eccentricity at all exposure durations and spatial frequencies tested.
J, Rovamo +3 more
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Age-Related Changes in Contrast Sensitivity in Central and Peripheral Retina
Perception, 1988Eight young (average age 20.4 years) and eight elderly (average age 64.4 years) observers took part in three experiments designed to study age-related changes in peripheral retinal function. A further eight young (average age 22.3 years) and eight elderly (average age 63.8 years) observers took part in a replication of experiment 3.
Crassini B., Brown B., Bowman K.
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Central and peripheral contrast sensitivity in amblyopia with varying field size
Documenta Ophthalmologica, 1984The purpose of the present study was to establish the extent of the amblyopic deficit at 0 degree, 10 degrees, and 20 degrees retinal eccentricity using contrast sensitivity measures for sine wave gratings subtending various field sizes. Contrast sensitivity functions were shown to vary with stimulus field size, retinal location and degree of amblyopia.
L M, Katz, D M, Levi, H E, Bedell
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Peripheral contrast sensitivity for dynamic sinusoidal gratings in early glaucoma
Acta Ophthalmologica Scandinavica, 1995ABSTRACT Automated contrast thresholds were established for dynamic, 2 reversals per sec phase‐shifted, sinusoidal gratings in a 5° circular test field centred 7.5° from the fixation point in six positions in the visual field in 16 patients (age 56–76 years) with clinically established (optic disc or nerve fibre layer damage) early glaucoma, without ...
B L, Lundh, E, Gottvall
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Peripheral contrast sensitivity for sine-wave gratings and single periods
Vision Research, 1980Abstract The contrast sensitivity of the human eye has been measured as a function of eccentricity. The stimulus used was a sine-wave grating with a fixed height of 5° in a surround of luminance that equals the average stimulus luminance. The measurements were carried out with stimulus width as the independent variable.
J N, Kroon +2 more
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Peripheral resolution and contrast sensitivity: effects of monochromatic and chromatic aberrations
Journal of the Optical Society of America A, 2019Correction and manipulation of peripheral refractive errors are indispensable for people with central vision loss and in optical interventions for myopia control. This study investigates further enhancements of peripheral vision by compensating for monochromatic higher-order aberrations (with an adaptive optics system) and chromatic aberrations (with a
Abinaya Priya Venkataraman +5 more
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Reduced Contrast Sensitivity Function in Central and Peripheral Vision by Disability Glare
Perception, 2020Various glares can decrease visual performance and cause discomfort, thus increasing drivers’ risk for traffic accidents in real life. The current study aimed to systematically investigate glare sensitivity in the central and peripheral visual fields by measuring contrast sensitivity function (CSF) under nonglare, steady glare, and transient glare ...
Di Wu +5 more
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Spatial scaling of central and peripheral contrast-sensitivity functions
Journal of the Optical Society of America A, 1987Contrast sensitivity was measured as a function of spatial frequency at various eccentricities in the nasal visual field. Eccentricity influenced resolution more for vertical gratings than for horizontal ones, demonstrating a nasal field anisotropy.
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