Table 4.
Mean scores (95% CI) by visual acuity (better eye), binocular status, and by between eye differences in visual acuity
| Exposure | Number (%) | General vision | Near activities | Total VFQ score |
| Visual acuity (better eye) | ||||
| 6/9 or better | 877 (50) | 79.7 (78.8, 80.5) | 99.4 (99.2, 99.5) | 94.7 (94.3, 95.1) |
| <6/9 to 6/12 | 387 (22) | 75.0 (73.6, 76.4) | 98.6 (98.1, 98.9) | 92.8 (92.0, 93.4) |
| <6/12 to 6/18 | 277 (16) | 72.1 (70.3, 73.8) | 97.2 (96.1, 98.0) | 91.2 (90.1, 92.2) |
| <6/18 | 203 (12) | 60.4 (57.7, 63.0) | 88.1 (82.5, 92.0) | 83.1 (80.5, 85.3) |
| P-value † | 1744 | <0.001 | <0.001 | <0.001 |
| Binocular status | ||||
| Binocular | 1561 (90) | 76.7 (76.0, 77.3) | 98.9 (98.7, 99.0) | 93.6 (93.3, 93.9) |
| Monocular ‡ | 183 (10) | 64.7 (62.0, 67.3) | 94.7 (92.0, 96.5) | 83.1 (80.4, 85.5) |
| P-value | 1744 | <0.001 | <0.001 | <0.001 |
| Difference in acuity between eyes | ||||
| Equal acuity | 185 (12) | 80.2 (78.4, 81.9) | 99.4 (99.1, 99.6) | 95.4 (94.6, 96.0) |
| ≤ 0.1 LogMAR | 657 (42) | 77.9 (76.9, 78.9) | 99.2 (99.0, 99.3) | 94.5 (94.0, 94.9) |
| >0.1 LogMAR | 719 (46) | 75.4 (74.4, 76.4) | 98.4 (98.1, 98.7) | 92.6 (92.0, 93.1) |
| P-value † | <0.001 | <0.001 | <0.001 |
Scores by levels of visual acuity, binocular status, and differences in acuity between eyes adjusted for age, gender, practice, and for other exposures listed in the table throughout
‡ 183 participants could not read the chart at 1 metre in one eye