Table 1
 Summary of FD2 data for all children examined
Study status
Mean age (SD) (months)
Sex
Mean stereopsis (seconds of arc) (SD)
No
M
F
Responders
47.7 (7.6)
31
24
29.6 (13.1)
55
6 metres
49.2 (7.9)
22
20
92.3 (52.6)
42
3 metres
42.9 (3.9)
7
6
13
FD2 negative
47.8(11.1)
3
1
4
Total number
34
25
59