Table 5 The percentage number of students in each class with VA poorer than the mean VA demand at distance and near.
From: Habitual visual acuity and visual acuity threshold demands in Nigerian school classrooms
Class | Mean age (years) | Mean maximum distance VA demand (LogMAR) | Mean actual near VA demand (LogMAR) | VA poorer than mean maximum distance VA demand (%) | VA poorer than mean actual near VA demand (%) | Average number of students per class |
|---|---|---|---|---|---|---|
Primary 1 | 7.02 | 0.32 | 0.38 | 1.22 | 0.61 | 34.92 |
Primary 2 | 7.74 | 0.21 | 0.33 | 1.24 | 0.62 | 38.62 |
Primary 3 | 8.84 | 0.19 | 0.32 | 2.75 | 0.55 | 36.31 |
Primary 4 | 9.83 | 0.41 | 0.32 | 1.34 | 2.01 | 32.00 |
Primary 5 | 10.77 | 0.21 | 0.27 | 3.90 | 2.60 | 30.67 |
Primary 6 | 11.63 | 0.11 | 0.26 | 2.19 | 2.19 | 34.67 |
JSS 1 | 11.13 | 0.18 | 0.12 | 5.05 | 5.50 | 59.67 |
JSS 2 | 12.16 | 0.14 | 0.12 | 4.85 | 3.52 | 66.75 |
JSS 3 | 12.95 | 0.19 | 0.11 | 6.28 | 6.28 | 58.25 |
SSS 1 | 14.10 | 0.14 | 0.04 | 4.90 | 9.31 | 49.58 |
SSS 2 | 15.05 | 0.19 | 0.05 | 7.79 | 10.82 | 42.69 |
SSS 3 | 16.03 | 0.14 | 0.06 | 7.07 | 7.61 | 30.09 |
