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Nine daily sessions of perceptual learning improved two adult amblyopic subjects’ stereo acuity to normal levels (open symbols), but had little effect on the stereo acuity of two visually normal subjects who had their stereo acuity degraded using monocular dioptric blur (grey symbols). Both amblyopic subjects had retained the improvements in stereo acuity 7 months after the cessation of training (Follow-up).
