The Tölz Temporal Topography Study: Mapping the visual field across the life span. Part I: The topography of light detection and temporal-information processing

Poggel, Dorothe A.; Treutwein, Bernhard; Calmanti, Claudia; Strasburger, Hans

doi:10.3758/s13414-012-0278-z

Cited by 14 publications

(17 citation statements)

References 60 publications

(110 reference statements)

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“…This may reflect variability in how people distribute their attention when faced with uncertainty about visual field location of the stimulus they are to respond to. In traditional psychophysical studies the observer usually knows where the stimulus will occur, but in perimetric studies the observer must distribute attention across a very wide range of potential stimulus locations (Pelli 1985, Wall, Woodward et al 2004, Gardiner, Swanson et al 2008, Carrasco 2011, Poggel, Treutwein et al 2012, Khuu and Kalloniatis 2015). …”

Section: Discussionmentioning

confidence: 99%

Individual differences in the shape of the nasal visual field

et al. 2017

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Between-subject differences in the shape of the nasal visual field were assessed for 103 volunteers 21–85 years of age and free of visual disorder. Perimetry was conducted with a stimulus for which contrast sensitivity is minimally affected by peripheral defocus and decreased retinal illumination. One eye each was tested for 103 volunteers free of eye disease in a multi-center prospective longitudinal study. A peripheral deviation index was computed as the difference in log contrast sensitivity at outer (25°–29° nasal) and inner (8° from fixation) locations. Values for this index ranged from 0.01 (outer sensitivity slightly greater than inner sensitivity) to −0.7 log unit (outer sensitivity much lower than inner sensitivity). Mean sensitivity for the inner locations was independent of the deviation index (R2 < 1%), while mean sensitivity for the outer locations was not (R2 = 38%, p < 0.0005). Age was only modestly related to the index, with a decline by 0.017 log unit per decade (R2 = 10%). Test-retest data for 21 volunteers who completed 7–10 visits yielded standard deviations for the index from 0.04 to 0.17 log unit, with a mean of 0.09 log unit. Between-subject differences in peripheral deviation persisted over two years of longitudinal testing. Peripheral deviation indices were correlated with indices for three other perimetric stimuli used in a subset of 24 volunteers (R2 from 20% – 49%). Between-subject variability in shape of the visual field raises concerns about current clinical visual field indices, and further studies are needed to develop improved indices.

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Section: Discussionmentioning

confidence: 99%

Individual differences in the shape of the nasal visual field

et al. 2017

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“…We compared the processing speed of both patients groups to a normative sample from the Tölz Temporal Topography study which used the same methodology of visual field testing [24]. The mean age of pre- and post-chiasmatic subjects was 54.9 yrs.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, HRP provides an excellent spatial resolution and enables reaction time recording and analysis. Details of HRP are described elsewhere [16], [24]–[27].…”

Section: Methodsmentioning

confidence: 99%

The Second Face of Blindness: Processing Speed Deficits in the Intact Visual Field after Pre- and Post-Chiasmatic Lesions

2013

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PurposeDamage along the visual pathway results in a visual field defect (scotoma), which retinotopically corresponds to the damaged neural tissue. Other parts of the visual field, processed by the uninjured tissue, are considered to be intact. However, perceptual deficits have been observed in the “intact” visual field, but these functional impairments are poorly understood. We now studied temporal processing deficits in the intact visual field of patients with either pre- or post-chiasmatic lesions to better understand the functional consequences of partial blindness.MethodsPatients with pre- (n = 53) or post- chiasmatic lesions (n = 98) were tested with high resolution perimetry – a method used to map visual fields with supra-threshold light stimuli. Reaction time of detections in the intact visual field was then analyzed as an indicator of processing speed and correlated with features of the visual field defect.ResultsPatients from both groups exhibited processing speed deficits in their presumably “intact” field as indicated by comparison to a normative sample. Further, in both groups processing speed was found to be a function of two factors. Firstly, a spatially restricted (retinotopic) influence of the scotoma was seen in longer reaction times when stimuli were presented in intact field sectors close to the defect. Secondly, patients with larger scotomata had on average longer reaction times in their intact field indicating a more general (non-retinotopic) influence of the scotoma.ConclusionsProcessing speed deficits in the “intact” visual field of patients with visual system damage demonstrate that visual system lesions have more widespread consequences on perception than previously thought. Because dysfunctions of the seeing field are expected to contribute to subjective vision, including visual tests of the presumed “intact” field may help to better understand vision loss and to improve methods of vision restoration and rehabilitation.

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“…Moreover, HRP provides an excellent spatial resolution and enables reaction time recording and analysis. Details of HRP are described elsewhere [16,[24][25][26][27].…”

Section: Clinical Examinationmentioning

confidence: 99%

“…Firstly, we compared intact field RT of both patients groups, pre-and post-chiasmatic, to normative data of healthy subjects (347.264ms) in the Tölz Temporal Topography Study [24]. In both, pre-chiasmatic (469.4610ms; t(1,41) = 12.18, p,0.001) and post-chiasmatic patients (437.466ms; t(1,91) = 13.8, p,0.001) RT was significantly longer than in the control group.…”

Section: Intact Field Rt Is Higher In Patients Than In Control Subjectsmentioning

confidence: 99%

The second face of blindness: Processing speed deficits in the intact visual field after pre- and post-chiasmatic lesions

Bola

Gall

Sabel

2013

Journal of the Neurological Sciences

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Purpose: Damage along the visual pathway results in a visual field defect (scotoma), which retinotopically corresponds to the damaged neural tissue. Other parts of the visual field, processed by the uninjured tissue, are considered to be intact. However, perceptual deficits have been observed in the ''intact'' visual field, but these functional impairments are poorly understood. We now studied temporal processing deficits in the intact visual field of patients with either pre-or postchiasmatic lesions to better understand the functional consequences of partial blindness.Methods: Patients with pre-(n = 53) or post-chiasmatic lesions (n = 98) were tested with high resolution perimetry -a method used to map visual fields with supra-threshold light stimuli. Reaction time of detections in the intact visual field was then analyzed as an indicator of processing speed and correlated with features of the visual field defect.

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The Tölz Temporal Topography Study: Mapping the visual field across the life span. Part I: The topography of light detection and temporal-information processing

Cited by 14 publications

References 60 publications

Individual differences in the shape of the nasal visual field

Individual differences in the shape of the nasal visual field

The Second Face of Blindness: Processing Speed Deficits in the Intact Visual Field after Pre- and Post-Chiasmatic Lesions

The second face of blindness: Processing speed deficits in the intact visual field after pre- and post-chiasmatic lesions

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