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Age specific prevalence of vision loss attributable to trachoma (n = 3,567). Normal vision = presenting visual acuity of ≥ 6/18 in the better eye; Low vision = presenting visual acuity of < 6/18 to ≤ 3/60 in the better eye; Blindness = presenting visual acuity of < 3/60 in the better eye. Three children aged 0–4 years assumed to have normal vision.
