Diagnostic aids

Location of cracks

Total

x²

p value

Central

n = 242

n (%)

Peripheral

n = 22

n (%)

Naked eye

87 (36.0)

1 (4.5)

88

54.096

<0.001

Transillumination

101 (41.7)

17 (77.3)

118

74.336

<0.001

Dye

24 (9.9)

2 (9.1)

26

14.226

0.001

Magnification

30 (12.4)

2 (9.1)

32

22.718

<0.001