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Characteristics of visual crowding in the presence of macular disease: evidence for plasticity in the visual system| old_uid | 11879 |
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| title | Characteristics of visual crowding in the presence of macular disease: evidence for plasticity in the visual system |
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| start_date | 2016/06/17 |
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| schedule | 11h-12h |
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| online | no |
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| summary | Crowding refers to the impaired ability to recognize an object in clutter. It is a bottleneck for object recognition in normal peripheral vision. There are several well-known hallmarks of visual crowding, including the dependence of the critical spacing (the minimum distance between an object and its flankers to avoid crowding) on retinal eccentricity, the inward-outward asymmetry of the flanker effect ; and the radial-tangential anisotropy of the shape of the crowding zone. Because the crowding effect is more substantial in the normal periphery than at the fovea, it has been suggested as a major limiting factor on vision in people who lose their central vision due to macular disease and must use their peripheral vision. However, recent evidence reveals that the characteristics of visual crowding are different in people with macular disease, compared with the normal periphery. For example, the shape of the crowding zone does not exhibit the conventional radial-tangential anisotropy when measured at the preferred retinal locus (in the peripheral retina) of people with macular disease. These changes in the characteristics of visual crowding are interpreted as evidence of plasticity of the visual system following macular disease. Implications about these changes on other visual functions, such as reading, will be discussed. |
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| responsibles | Pélissier |
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