Percentage of newly diagnosed amblyopic patients with one or more of the following: A. a corrected interocular (or if not reported, the uncorrected) visual acuity difference < 0.23 logMAR 3-12 months after first diagnosis of amblyopia OR B. an improvement in the corrected visual acuity of the amblyopic eye of 3 or more Snellen lines (> or = 0.30 logMAR) 3-12 months after first diagnosis of amblyopia OR C. a final visual acuity in the amblyopic eye equal to 20/30 or better (less than or equal to 0.18 logMar) 3-12 months after first diagnosis of amblyopia