Table 2 Percentage of open fibers in the six test sessions (n = 10) for the thresholds of 50, 70 and 90% open fiber area.

50

100 [100;100]

100 [100;100]

99 [98;100]

90 [81;98]^{α β}

84 [69;92]^{α β}

32 [27;43]^{α β γ}

70

100 [99;100]

100 [99;100]

99 [97;99]

90 [81;98]^{α β}

83 [68;92]^{α β}

31 [26;41]^{α β γ}

90

74 [70;79]

74 [67;88]

64 [59;69]

63 [56;65]

52 [38;59]^{α β}

14 [9;17]^{α β γ}