Change of Contrast Sensitivity in Peripheral Vision Following Eccentric Viewing Training

2014 ◽  
Vol 19 (1) ◽  
pp. 99-104
Author(s):  
Jae-Myoung Seo ◽  
Ki-Young Lee ◽  
Yong-Moo Lim
Keyword(s):  
Contrast Sensitivity ◽  
Peripheral Vision ◽  
Eccentric Viewing

Reduced Contrast Sensitivity Function in Central and Peripheral Vision by Disability Glare

Perception ◽  
2020 ◽  
Vol 49 (12) ◽  
pp. 1348-1361
Author(s):  
Di Wu ◽  
Na Liu ◽  
Pengbo Xu ◽  
Kewei Sun ◽  
Wei Xiao ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Traffic Accidents ◽  
Peripheral Vision ◽  
Visual Fields ◽  
Real Life ◽  
Sensitivity Function ◽  
Visual Performance ◽  
Contrast Sensitivity Function ◽  
Central Vision ◽  
Disability Glare

Various 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 conditions. Nine observers with normal visual acuity in the dominant eye were enrolled. The CSF in central and peripheral vision (the 5° upper left visual field) was measured in a mesopic environment while the stimulus was displayed under three conditions: nonglare, steady glare, and transient glare. An orientation identification task was used to obtain the CSF. After the experiment, the observers were asked to report their level of discomfort in the presence of the glare. The area under the log CSF (AULCSF) and cut-off spatial frequency served as indicators of visual performance. In agreement with previous studies, both steady and transient glare reduced the AULCSF and cut-off frequency. However, the AULCSF and cut-off frequency were reduced more for central vision than for nearly peripheral vision. In addition, the extent of the decreases in the AULCSF and cut-off frequency was greater for steady glare than for transient glare; in contrast, more discomfort was associated with transient glare than steady glare.

Temporal Integration and Contrast Sensitivity in Foveal and Peripheral Vision

Perception ◽  
1984 ◽  
Vol 13 (6) ◽  
pp. 665-674 ◽  
Author(s):  
Jyrki Rovamo ◽  
Lea Leinonen ◽  
Pentti Laurinen ◽  
Veijo Virsu
Keyword(s):  
Visual Field ◽  
Spatial Frequency ◽  
Contrast Sensitivity ◽  
Peripheral Vision ◽  
Temporal Integration ◽  
Photopic Vision ◽  
Spatiotemporal Information ◽  
Spatial Frequencies ◽  
Primary Determinant ◽  
Integration Improvement

Spatial 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. The decrease was faster at high than at low spatial frequencies, but similar at different exposure durations. When cortically similar stimulus conditions were produced at different eccentricities by M-scaling, contrast sensitivity became independent of visual field location at all exposure durations tested. The results support the view that in photopic vision spatiotemporal information processing is qualitatively similar across the visual field, and that quantitative differences result from retinotopical differences in ganglion cell sampling. For gratings of constant retinal area temporal integration (improvement of contrast sensitivity with increasing exposure duration) was more extensive at high than at low retinal spatial frequencies but independent of cortical spatial frequency and eccentricity. For M-scaled gratings temporal integration was more extensive at high than at low cortical spatial frequencies but independent of retinal spatial frequency and eccentricity. The results suggest that the primary determinant of temporal integration is not spatial frequency but grating value that is calculated as AF2 square cycles (cycle2), where A is grating area and F spatial frequency.

scholarly journals Characterization of spatial aliasing and contrast sensitivity in peripheral vision

1996 ◽  
Vol 36 (2) ◽  
pp. 249-258 ◽  
Author(s):  
Larry N. Thibos ◽  
David L. Still ◽  
Arthur Bradley
Keyword(s):  
Contrast Sensitivity ◽  
Peripheral Vision ◽  
Spatial Aliasing

Defocused contrast sensitivity function in peripheral vision

2021 ◽  
Author(s):  
Durgasri Jaisankar ◽  
Marwan Suheimat ◽  
Robert Rosén ◽  
David A Atchison
Keyword(s):  
Contrast Sensitivity ◽  
Peripheral Vision ◽  
Sensitivity Function ◽  
Contrast Sensitivity Function

Visual acuity, contrast sensitivity, peripheral vision and refraction in low birthweight teenagers

2006 ◽  
Vol 85 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Susanne Lindqvist ◽  
Torstein Vik ◽  
Marit S. Indredavik ◽  
Ann-Mari Brubakk
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Low Birthweight ◽  
Peripheral Vision
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