Table 1
Age, sex, type of lens correction
Age
Sex
Lens
Mean
Median
Range
M
F
Spectacle
Contact
Group 1 (n=30)
45
46
21–64
8
22
19
11
Group 2 (n=40)
42
43
18–65
12
28
26
14
Group 3 (n=42)
41
43
18–60
12
30
26
16
Group 4 (n=30)
35
32
24–60
22
8
3
27