Learning to identify near-acuity letters, either with or without flankers, results in improved letter size and spacing limits in adults with amblyopia.

PloS One
Susana T L ChungDennis M Levi

Abstract

Amblyopia is a developmental abnormality that results in deficits for a wide range of visual tasks, most notably, the reduced ability to see fine details, the loss in contrast sensitivity especially for small objects and the difficulty in seeing objects in clutter (crowding). The primary goal of this study was to evaluate whether crowding can be ameliorated in adults with amblyopia through perceptual learning using a flanked letter identification task that was designed to reduce crowding, and if so, whether the improvements transfer to untrained visual functions: visual acuity, contrast sensitivity and the size of visual span (the amount of information obtained in one fixation). To evaluate whether the improvements following this training task were specific to training with flankers, we also trained another group of adult observers with amblyopia using a single letter identification task that was designed to improve letter contrast sensitivity, not crowding. Following 10,000 trials of training, both groups of observers showed improvements in the respective training task. The improvements generalized to improved visual acuity, letter contrast sensitivity, size of the visual span, and reduced crowding. The magnitude of the improv...Continue Reading

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Citations

Nov 15, 2013·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Susana T L Chung
Feb 14, 2015·Vision Research·Jinrong LiBenjamin Thompson
Apr 29, 2015·Vision Research·Indu VedamurthyDennis M Levi
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Jan 12, 2020·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Susana T L Chung
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Nov 12, 2013·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Luminita Tarita-NistorEsther G González
Jan 14, 2017·Frontiers in Systems Neuroscience·Marcello ManigliaYves Trotter
Aug 22, 2017·Frontiers in Neuroscience·Susana T L ChungDennis M Levi
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Dec 16, 2020·Journal of Clinical Medicine·Carlos J Hernández-RodríguezMaría Begoña Coco-Martín
Oct 26, 2021·Journal of Vision·Daniel R CoatesSusana T L Chung

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