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. 2017 May 10;4:13. doi: 10.1186/s40662-017-0079-5

Table 2.

Group comparisons preoperatively

Preoperative
Parameter CG SG1 SG2 p
CCT (μm) 529 ± 21 532 ± 28 539 ± 24 0.34
CCS (cm) 5.45 ± 0.72 5.39 ± 0.58 5.41 ± 0.73 0.44
TBUT (secs) 9.21 ± 0.99 8.94 ± 1.11 9.01 ± 1.05 0.35
FBS NA NA NA NA
BD NA NA NA NA
SS NA NA NA NA
TS NA NA NA NA
SDI NA NA NA NA

CCT = Central Corneal Thickness; CCS = Central Corneal Sensitivity; TBUT = Tear Break-up Time; FBS = Foreign Body Sensation; BD = Blinking Discomfort; SS = Stinging Sensation; TS = Tearing Sensation; SDI = Subjective Discomfort Index