A new method of visual exploration analysis

Müri, René Martin; Pflugshaupt, Tobias; Nyffeler, Thomas; von Wartburg, Roman; Wurtz, Pascal (2005). A new method of visual exploration analysis. Revue neurologique, 161(5), pp. 513-517. Issy-les-Moulineaux (F): Elsevier Masson 10.1016/S0035-3787(05)85085-4

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The term visual field corresponds to the angular field of view that is seen by the eyes when they are fixed on a point straight-ahead. In neurological patients--e.g. stroke, trauma, or tumour patients--visual field function can be restricted, depending on lesion site and size. In contrast, the term "functional visual field" describes the area of visual field responsiveness under more ordinary viewing conditions. The visual exploration, i.e. the capacity to explore and analyze our visual world, is dependent on the integrity of the visual system and the oculomotor system which has to move the fovea from one object of interest to the next. In this paper, we present a new method to assess the functional visual field, conceptualized as the area that a patient actively scans with eye movements to detect predefined targets placed on everyday scenes. This method allows us to compare three levels of visual field function: (a) the spatial distribution of successful search (hits, i.e. which targets did the patient find?), (b) the spatial distribution of fixations (i.e. where did the patient preferentially search for targets?), and (c) the retinotopic level (i.e. the visual field assessed by perimetry). By integrating these three levels, one can evaluate functional outcomes of visual field disorders. Of particular importance is the question of how a patient compensates for a visual field loss with appropriate eye movements. A further clinical application of this method is the comparison of pre- with post-treatment data. Patients with visual field disorders usually undergo specific exploration trainings, aimed at enhancing the number and amplitude of saccades towards the region of the visual field deficit. The first experiences and clinical application with this method are presented here.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR)
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Forschungsbereich Pavillon 52 > Forschungsgruppe Perzeption und Okulomotorik
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DCR Unit Sahli Building > Forschungsgruppe Neurologie

UniBE Contributor:

Müri, René Martin; Pflugshaupt, Tobias; Nyffeler, Thomas; von Wartburg, Roman and Wurtz, Pascal

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0035-3787

Publisher:

Elsevier Masson

Language:

French

Submitter:

Pascal Wurtz

Date Deposited:

04 Mar 2014 20:39

Last Modified:

18 Sep 2014 13:40

Publisher DOI:

10.1016/S0035-3787(05)85085-4

PubMed ID:

16106802

URI:

https://boris.unibe.ch/id/eprint/38935

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