| Value | Category |
|---|---|
| 0 | |
| 1 | Sore eyes first month of life |
| 2 | sore eyes after one month |
| 3 | Severe diarrhoea before the age of six years |
| 4 | Cataract |
| 5 | Glaucoma |
| 6 | Corneal opacity |
| 7 | Other eye diseases |
| 8 | Small pox |
| 10 | Burns |
| 11 | Injury other than burns |
| 12 | Medical/surgical intervention |
| 13 | Old age |
| 14 | Other reasons |
| 15 | Not known |
| 41 | |
| Sysmiss |