Table.
Estimated Needs for a Total Population of Ten Million
| Low income | Middle income | High income | |
|---|---|---|---|
| ∗These are estimates which have not yet been confirmed by good epidemiological studies | |||
| Percentage 0–15yrs | 45% | 35% | 25% |
| No. children | 4.5m | 3.5m | 2.5m |
| Prevalence | |||
| Blindness | 1/1,000 | 0.7/1,000 | 0.4/1,000 |
| Low vision | 3/1,000∗ | 2/1,000∗ | 1/1,000∗ |
| Refractive errors | 1%∗ | 1%∗ | 1%∗ |
| Estimated | 25/100,000/yr∗ | 16/100,000/yr∗ | 8/100,000/yr∗ |
| incidence | |||
| Numbers affected | |||
| Blind | 4,500 | 2,800 | 1,000 |
| Low vision | 13,500 | 7,000 | 2,500 |
| Refractive errors | 45,000 | 35,000 | 25,000 |
| New blind | 1,125 | 560 | 200 |
| Avoidable causes | Corneal scar 20% | Cataract 15% | ROP 10% |
| Cataract 13% | ROP 10% | Teratogens 6% | |
| Glaucoma 6% | Glaucoma 6% | Cataract 6% | |
| Optic atrophy 6% | Teratogens 6% | Glaucoma 2% | |
| New cases/yr | |||
| Cataract | 100–150 | 50–60 | 20–30 |