Weighted prevalence of impaired vision and blindness based on presenting (pinhole) visual acuity by age, sex, education, and housing*
| Weighted prevalence percentage | ||||||
|---|---|---|---|---|---|---|
| Normal/near normal (NN) | Vision impairment (VI) | Unilateral blindness (UL) | Moderate bilateral blindness (MB) | Severe bilateral blindness (SB) | ||
| Presenting (pinhole) | Presenting (pinhole) | Presenting (pinhole) | Presenting (pinhole) | Presenting (pinhole) | Examined‡ No (%) | |
| *Vision categories are defined by visual acuity of both the better and worse eyes, respectively. NN = ≥6/18, ≥6/18; VI = ≥6/60, <6/18 to ≥6/60; UL = ≥6/60, <6/60; MB = <6/60 to ≥3/60 <6/60; SB = <3/60, <3/60; †indicates 95% confidence interval; ‡seven of the 3441 people examined were excluded from the prevalence calculation because of missing visual acuity measurements. | ||||||
| Age (years): | ||||||
| 60–69 | 71.7 (77.6) | 22.7 (17.9) | 4.9 (4.2) | 0.6 (0.3) | 0.1 (0.0) | 1729 (50.3) |
| 70–79 | 52.0 (58.8) | 38.0 (32.8) | 8.3 (7.2) | 1.0 (0.5) | 0.7 (0.6) | 1279 (37.2) |
| 80+ | 26.9 (37.0) | 48.0 (43.4) | 18.4 (16.6) | 3.4 (0.9) | 3.2 (2.0) | 426 (12.4) |
| Sex: | ||||||
| Male | 59.3 (66.4) | 31.4 (25.3) | 7.7 (7.5) | 1.0 (0.5) | 0.7 (0.4) | 1377 (40.1) |
| Female | 58.3 (64.9) | 31.8 (27.6) | 8.0 (6.5) | 1.1 (0.5) | 0.7 (0.5) | 2057 (59.9) |
| Education: | ||||||
| None | 52.7 (60.1) | 35.7 (30.9) | 9.4 (7.9) | 1.3 (0.6) | 0.9 (0.5) | 1663 (48.4) |
| Primary | 61.4 (68.2) | 30.4 (24.9) | 6.7 (6.3) | 0.9 (0.3) | 0.6 (0.4) | 1140 (33.2) |
| Secondary plus | 70.8 (75.9) | 22.3 (18.1) | 5.8 (5.2) | 0.7 (0.6) | 0.3 (0.3) | 631 (18.4) |
| Housing: | ||||||
| Public | 56.1 (63.5) | 33.5 (28.3) | 8.3 (7.2) | 1.3 (0.5) | 0.9 (0.5) | 1782 (51.9) |
| Home ownership | 61.2 (66.5) | 30.5 (26.3) | 6.8 (6.1) | 0.7 (0.6) | 0.7 (0.6) | 908 (26.4) |
| Private | 65.8 (71.6) | 26.1 (21.3) | 7.2 (6.6) | 0.8 (0.4) | 0.1 (0.1) | 744 (21.7) |
| All | 58.7 (65.5) | 31.6 (26.7) | 7.9 (6.9) | 1.1 (0.5) | 0.71 (0.46) | 3434 (100.0) |
| 95% CI† | 55.8, 61.5 (63.5, 67.4) | 29.6, 33.7 (25.0, 28.4) | 6.4, 9.4 (5.9, 7.9) | 0.65, 1.56 (0.20, 0.74) | 0.31, 1.10 (0.19, 0.73) | |
| Design effect | 2.65 (1.36) | 1.48 (1.13) | 2.43 (1.31) | 1.50 (1.26) | 1.73 (1.27) | |