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• W2160687992 abstract "Patients with age-related macular degeneration (AMD) or hereditary macular dystrophies (JMD) rely on an efficient use of their peripheral visual field. We trained eight AMD and five JMD patients to perform a texture-discrimination task (TDT) at their preferred retinal locus (PRL) used for fixation. Six training sessions of approximately one hour duration were conducted over a period of approximately 3 weeks. Before, during and after training twelve patients and twelve age-matched controls (the data from two controls had to be discarded later) took part in three functional magnetic resonance imaging (fMRI) sessions to assess training-related changes in the BOLD response in early visual cortex. Patients benefited from the training measurements as indexed by significant decrease (p=.001) in the stimulus onset asynchrony (SOA) between the presentation of the texture target on background and the visual mask, and in a significant location specific effect of the PRL with respect to hit rate (p=.014). The following trends were observed: (i) Improvement in Vernier acuity for an eccentric line-bisection task; (ii) positive correlation between the development of BOLD signals in early visual cortex and initial fixation stability (r=0.531); (iii) positive correlation between the increase in task performance and initial fixation stability (r=0.730). The first two trends were non-significant, whereas the third trend was significant at p=.014, Bonferroni corrected. Consequently, our exploratory study suggests that training on the TDT can enhance eccentric vision in patients with central vision loss. This enhancement is accompanied by a modest alteration in the BOLD response in early visual cortex." @default.
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• W2160687992 date "2014-10-17" @default.
• W2160687992 modified "2023-10-18" @default.
• W2160687992 title "Perceptual learning in patients with macular degeneration" @default.
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• W2160687992 doi "https://doi.org/10.3389/fpsyg.2014.01189" @default.
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