Table 2.
Aetiology of blindness and visual impairment
| Aetiological factor | Frequency | Percentage |
|---|---|---|
| Hereditary | 13 | 21.0 |
| Intrauterine | 23 | 37.1 |
| Childhood | 10 | 16.1 |
| Unknown | 14 | 22.6 |
| Trauma | 2 | 3.2 |
| Total | 62 | 100 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.