Ms. Anne-Catherine Scherlen Profile

Anne-Catherine Scherlen

at Univ Jean Monnet Saint-Etienne

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Proceedings Article | 18 March 2005 Paper

Methods study for the relocation of visual information in central scotoma cases

Anne-Catherine Scherlen, Vincent Gautier

Proceedings Volume 5666, (2005) https://doi.org/10.1117/12.597429

KEYWORDS: Information visualization, Visualization, Eye, Visibility, Calibration, Optical tracking, Pathology, Human-machine interfaces, Electronic imaging, Retina

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In this study we test the benefit on the reading performance of different ways to relocating the visual information present under the scotoma. The relocation (or unmasking) allows to compensate the loss of information and avoid the patient developing driving strategies not adapted for the reading. Eight healthy subjects were tested on a reading task, on each a central scotoma of various sizes was simulated. We then evaluate the reading speed (words/min) during three visual information relocation methods: all masked information is relocated - on both side of scotoma, - on the right of scotoma, - and only essentials letters for the word recognition too on the right of scotoma. We compare these reading speeds versus the pathological condition, ie without relocating visual information. Our results show that unmasking strategy improve the reading speed when all the visual information is unmask to the right of scotoma, this only for large scotoma. Taking account the word morphology, the perception of only certain letters outside the scotoma can be sufficient to improve the reading speed. A deepening of reading processes in the presence of a scotoma will then allows a new perspective for visual information unmasking. Multidisciplinary competences brought by engineers, ophtalmologists, linguists, clinicians would allow to optimize the reading benefit brought by the unmasking.

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