1. Colour recognition at large visual eccentricities in normal observers and patients with low vision
- Author
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Fatima Naili, Muriel Boucart, Pascal Despretz, Laboratoire de Neurosciences Fonctionnelles et Pathologies (LNFP), and Université de Lille, Droit et Santé-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Adult ,media_common.quotation_subject ,Vision Disorders ,MESH: Pattern Recognition, Visual ,MESH: Color Perception ,050105 experimental psychology ,03 medical and health sciences ,0302 clinical medicine ,Form perception ,MESH: Analysis of Variance ,Colour perception ,Perception ,Reaction Time ,Humans ,0501 psychology and cognitive sciences ,Computer vision ,Mathematics ,media_common ,Analysis of Variance ,MESH: Humans ,business.industry ,General Neuroscience ,05 social sciences ,Cognitive neuroscience of visual object recognition ,MESH: Adult ,MESH: Reaction Time ,Visual field ,Low vision ,MESH: Photic Stimulation ,Pattern Recognition, Visual ,Categorization ,MESH: Vision Disorders ,Grey level ,[SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] ,Artificial intelligence ,Visual Fields ,MESH: Visual Fields ,business ,Color Perception ,Photic Stimulation ,030217 neurology & neurosurgery - Abstract
International audience; When we look at our spatial environment we have the feeling that the whole visual field is coloured, yet the density of cone photoreceptors decreases considerably as eccentricity increases. We investigated colour perception (coloured/noncoloured), colour naming and whether colour helps object recognition at eccentricities varying from 0 degrees to 80 degrees in healthy observers and patients with low vision. We found that colours can be perceived and even identified above chance at very large eccentricities (60 degrees). When asked to categorize coloured and grey level objects as edible/nonedible, both healthy observers and patients with low vision showed better performance for coloured edible objects at 50 degrees suggesting that colour is used for object recognition in conditions of degraded form perception.
- Published
- 2006
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