Visual acuity | Total number (%) | Clean fuel as current main fuel | Biomass as current main fuel | ||||
---|---|---|---|---|---|---|---|
Always used clean fuel n (%) | Switched from biomass fuel n (%) | Total n (%) | Switched from clean fuel n (%) | Always used biomass fuel n (%) | Total n (%) | ||
Right eye | 784 | 71 | 169 | 240 (30.6) | 83 | 461 | 544 (69.4) |
Normal | 648 (82.6) | 67 (94.4) | 145 (86.8) | 212 (88.3) | 76 (91.6) | 360 (78.1) | 436 (80.1) |
Mild impairment | 41 (5.2) | 2 (2.8) | 5 (3.0) | 7 (2.9) | 4 (4.8) | 30 (6.5) | 34 (6.2) |
Moderate impairment | 74 (9.4) | 2 (2.8) | 15 (8.9) | 17 (7.1) | 3 (3.6) | 54 (11.7) | 57 (10.5) |
Severe impairment | 9 (1.1) | 0 (0.0) | 1 (0.6) | 1 (0.4) | 0 (0.0) | 8 (1.7) | 8 (1.5) |
Blindness | 12 (1.5) | 0 (0.0) | 3 (1.8) | 3 (1.2) | 0 (0.0) | 9 (1.9) | 9 (1.6) |
Left eye | 784 | 71 | 169 | 240 (30.6) | 83 | 461 | 544 (69.4) |
Normal | 645 (82.3) | 63 (88.7) | 145 (85.8) | 208 (86.7) | 74 (89.2) | 363 (78.7) | 437 (80.3) |
Mild impairment | 55 (7.0) | 4 (5.6) | 7 (4.1) | 11 (4.6) | 6 (7.2) | 38 (8.2) | 44 (8.1) |
Moderate impairment | 56 (7.1) | 4 (5.6) | 11 (6.5) | 15 (6.2) | 3 (3.6) | 38 (8.2) | 41 (7.5) |
Severe impairment | 10 (1.3) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 10 (2.1) | 10 (1.8) |
Blindness | 18 (2.3) | 0 (0.0) | 6 (3.5) | 6 (2.5) | 0 (0.0) | 12 (2.6) | 12 (2.2) |
Values represent N (column %); clean fuel=use of electricity/liquefied petroleum gas and/or methane; normal vision (with visual acuity 6/6–6/12), mild vision impairment (with visual acuity worse than 6/12), moderate vision impairment (with visual acuity worse than 6/18), severe visual impairment (with visual acuity worse than 6/60), blindness (with visual acuity worse than 3/60).