Table 6 Etiological causes of visual impairment categorized by onset.

From: The prevalence and causes of visual impairment in special schools and blind schools in Shanxi Province, China: a cross-sectional study

Etiology

N

%

Undetermined

30

53.6

Hereditary

14

25.0

Postnatal

7

12.5

Perinatal

3

5.4

Intrauterine

2

3.6

Total

56

100

Back to article page