Low vision differences between static and moving patterns in central and peripheral fields

Nyquist, Jeffrey B.; Lusk, Kelly E.; Lappin, Joseph S.; Corn, Anne L.; Tadin, Duje

doi:10.1167/5.8.300

Cited by 2 publications

(5 citation statements)

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“…Notice that average performance was almost equivalent between the two groups in the far periphery. Because this task is a measure of peripheral spatial acuity, these results show a similar pattern to the study described earlier (Nyquist et al, 2005) Participants are ordered within group by acuity from best to worst.…”

Section: Individual Pre-training Thresholdssupporting

confidence: 71%

“…Figure 19 below shows that on average LV individuals are performing very similar to their typically-sighted counterparts. This is not completely surprising, given that our previous findings (Nyquist et al, 2005) showed remarkably good peripheral acuity for LV youth.…”

Section: Crowdingsupporting

confidence: 70%

“…Compared to typically-sighted acuities, LV children have less drop-off in peripheral acuity, (Nyquist et al, 2005). Relatively speaking, their peripheral vision has an elevated resolution and therefore may be an important resource to better utilize.…”

Section: Low Visionmentioning

confidence: 99%

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Perceptual training yields rapid improvements in visually impaired youth

2010

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Section: Individual Pre-training Thresholdssupporting

confidence: 71%

Section: Crowdingsupporting

confidence: 70%

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Perceptual training yields rapid improvements in visually impaired youth

2010

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“…We had previously found high duration thresholds for motion discrimination in observers with CN (Nyquist et al, 2005). Later pilot studies, however, suggested that lowvision motion sensitivity might be better for faster motions than for the relatively slow speeds (1-2-/s) we used initially.…”

Section: Motion Speed Affects Observers With Nystagmusmentioning

confidence: 81%

“…Effects of speed and eccentricity on motion discrimination by observers with nystagmus Congenital nystagmus (CN) yields reductions in both acuity and motion sensitivity (Abadi, Whittle, & Worfolk, 1999;Acheson, Shallo-Hoffman, Bronstein, & Gresty, 1997;Nyquist, Lusk, Lappin, Corn, & Tadin, 2005). Thus, the linkage between reduced spatial acuity and motion perception in CN may differ from the small effect of acuity on peripheral motion discrimination.…”

Section: Methodsmentioning

confidence: 99%

Spatial and temporal limits of motion perception across variations in speed, eccentricity, and low vision

Lappin¹,

Tadin²,

Nyquist³

et al. 2009

Journal of Vision

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We evaluated spatial displacement and temporal duration thresholds for discriminating the motion direction of gratings for a broad range of speeds (0.06 degrees/s to 30 degrees/s) in fovea and at +/-30 degrees eccentricity. In general, increased speed yielded lower duration thresholds but higher displacement thresholds. In most conditions, these effects of speed were comparable in fovea and periphery, yielding relatively similar thresholds not correlated with decreased peripheral acuity. The noteworthy exceptions were interactive effects at slow speeds: (1) Displacement thresholds for peripheral motion were affected by acuity limits for speeds below 0.5 degrees/s. (2) Low-vision observers with congenital nystagmus had elevated thresholds for peripheral motion and slow foveal motion but resembled typically sighted observers for foveal motions at speeds above 1 degree/s. (3) Suppressive center-surround interactions were absent below 0.5 degrees/s and their strength increased with speed. Overall, these results indicate qualitatively different sensitivities to slow and fast motions. Thresholds for very slow motion are limited by spatial resolution, while thresholds for fast motion are probably limited by temporal resolution.

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Low vision differences between static and moving patterns in central and peripheral fields

Cited by 2 publications

References 0 publications

Perceptual training yields rapid improvements in visually impaired youth

Perceptual training yields rapid improvements in visually impaired youth

Spatial and temporal limits of motion perception across variations in speed, eccentricity, and low vision

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