This study examined whether the development of crowded near visual acuity can be stimulated and whether crowding effects can be reduced by perceptual learning. The authors compared a magnifier crowded task with a perceptual learning crowded task and perceptual learning uncrowded task in 45 children with visual impairment and 29 children with normal vision. Children with visual impairment showed higher baseline crowding ratios than children with normal vision. Results showed improvement of single near visual acuity for all training groups. The crowded perceptual learning group showed the largest improvement in near visual acuity after training.

Perceptual learning in children with visual impairment improves near visual acuity.
Huurneman B, Boonstra FN, Cox RFA, et al.
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Carmel Noonan

Aintree University Hospital, Liverpool, UK

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