Temporal perceptual training enhances visual acuity in adult amblyopia: a single-case study

Amblyopia is usually framed as a persistent spatial-acuity disorder, yet temporal processing is also abnormal, including impaired visual synchrony and prolonged temporal integration [ 1 , 2 ]. This raises a mechanistic question: if residual acuity loss is partly constrained by temporal-resolution limits, temporal perceptual learning may improve acuity. Although perceptual learning can modify adult visual performance [ 3 ], most amblyopia protocols train spatial features. We therefore tested whether two-flash fusion training, a temporal discrimination task, transfers to monocular visual acuity.