Table 3 Prevalence of distance visual impairment based on presenting VA and BCVA
From: An evaluation of a community-based vision care programme for the elderly
Level of distance visual impairment (VI) | Prevalence of distance visual impairment, n (%), N = 8899 | |||
|---|---|---|---|---|
VA less than 6/18 in the worse eye | VA less than 6/18 in the better eye | |||
Based on presenting VA | Based on BCVA | Based on presenting VA | Based on BCVA | |
None (≤ 6/18) | 5417 (60.9) | 7672 (86.2) | 7360 (82.7) | 8526 (95.8) |
Moderate (> 6/18 and ≤ 6/60) | 2937 (33.0) | 925 (10.4) | 1480 (16.6) | 359 (4.0) |
Severe (> 6/60 and ≤ 6/120) | 329 (3.7) | 125 (1.4) | 49 (0.6) | 11 (0.1) |
Blindness (> 6/120) | 216 (2.4) | 177 (2.0) | 10 (0.1) | 3 (0.03) |
Sub-total of visually impaired | 3482 (39.1) | 1227 (13.8) | 1539 (17.3) | 373 (4.2) |