Figure 1
From: Habitual visual acuity and visual acuity threshold demands in Nigerian school classrooms

Distance and near VA as a function of age; classified into school types (a and c) and school ownership (b and d).
From: Habitual visual acuity and visual acuity threshold demands in Nigerian school classrooms

Distance and near VA as a function of age; classified into school types (a and c) and school ownership (b and d).