Table 3.
Prevalence of uncorrected visual acuity (UCVA) with lines of visual acuity improvement in the better-seeing eye with best correction.
| UCVA | Lines of Improvement with BCVA | Total | ||||||
|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | 5 | ≥6 | ||
| n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |
| 20/20 | 406 (66.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 406 (20.0) |
| 20/25 | 48 (7.8) | 288 (62.2) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 336 (16.6) |
| 20/32 | 22 (3.6) | 64 (13.8) | 182 (56.7) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 268 (13.2) |
| 20/40 | 20 (3.2) | 34 (7.3) | 53 (16.5) | 123 (54.9) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 230 (11.4) |
| 20/50 | 19 (3.1) | 24 (5.2) | 29 (9.0) | 41 (18.3) | 76 (53.5) | 0 (0.0) | 0 (0.0) | 189 (9.3) |
| 20/63 | 10 (1.6) | 19 (4.1) | 15 (4.7) | 23 (10.3) | 27 (19.0) | 64 (60.4) | 0 (0.0) | 158 (7.8) |
| 20/80 | 13 (2.1) | 12 (2.6) | 19 (5.9) | 12 (5.4) | 13 (9.1) | 10 (9.4) | 42 (27.3) | 121 (6.0) |
| 20/100 | 6 (1.0) | 9 (1.9) | 9 (2.8) | 6 (2.7) | 11 (7.7) | 12 (11.3) | 36 (23.4) | 89 (4.4) |
| 20/125 | 3 (0.5) | 9 (1.9) | 5 (1.6) | 11 (4.9) | 6 (4.2) | 7 (6.6) | 31 (20.1) | 72 (3.6) |
| 20/160 | 4 (0.6) | 1 (0.2) | 3 (0.9) | 1 (0.4) | 5 (3.5) | 2 (1.9) | 15 (9.7) | 31 (1.5) |
| 20/200 | 1 (0.2) | 2 (0.4) | 2 (0.6) | 4 (1.8) | 2 (1.4) | 8 (7.5) | 16 (10.4) | 35 (1.7) |
| 20/250 | 0 (0.0) | 0 (0.0) | 2 (0.6) | 1 (0.4) | 1 (0.7) | 1 (0.9) | 4 (2.6) | 9 (0.4) |
| 20/320 | 2 (0.3) | 0 (0.0) | 2 (0.6) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 5 (3.2) | 9 (0.4) |
| 20/400 | 7 (1.1) | 1 (0.2) | 0 (0.0) | 1 (0.4) | 1 (0.7) | 1 (0.9) | 3 (1.9) | 14 (0.7) |
| <20/400 | 54 (8.8) | 0 (0.0) | 0 (0.0) | 1 (0.4) | 0 (0.0) | 1 (0.9) | 2 (1.3) | 58 (2.9) |
| ALL | 615 (30.4) | 463 (22.9) | 321 (15.9) | 224 (11.0) | 142 (7.0) | 106 (5.2) | 154 (7.6) | 2025 (100.0) |
UCVA – uncorrected visual acuity; BCVA – best-corrected visual acuity.