Table 3.

Comparison of the Preoperative and Postoperative CXL SBT Parameters

Parameter	Preoperative CXL	Postoperative CXL	p
Integrated radius (1/mm)	12.19 ± 1.95	11.26 ± 1.89	<0.0001
Max inverse radius (1/mm)	0.24 ± 0.04	0.23 ± 0.04	0.0053
DA ratio max (2 mm)	5.53 ± 0.81	5.29 ± 0.71	0.0048
SP-A1	71.09 ± 19.14	75.01 ± 17.63	0.0679
SSI	0.74 ± 0.16	0.84 ± 0.20	<0.0001

Abbreviations: Integrated radius, integrated area under the curve of the inverse concave radius; Max inverse radius, maximum inverse radius; DA ratio max, deformation amplitude ratio max 2 mm; SP-A1, stiffness parameter at applanation 1; SSI, stress-strain index; CXL, corneal cross-linking; SBT, Scheimpflug-based tonometer.