In Vivo Corneal Biomechanical Properties with Corneal Visualization Scheimpflug Technology in Chinese Population

Table 2

Biomechanical parameters derived from corneal visualization Scheimpflug technology by gender and mean ± standard deviation (range).

Parameters	All ()	Female ()	Male ()	value
First applanation time (ms)	7.33 ± 0.32 (6.63~8.39)	7.32 ± 0.29 (6.7~8.39)	7.35 ± 0.34 (6.63~8.38)	0.667^†
First applanation length (mm)	1.79 ± 0.07 (1.38~1.9)	1.79 ± 0.05 (1.43~1.9)	1.78 ± 0.08 (1.38~1.9)	0.940^†
Velocity in (m/s)	0.15 ± 0.02 (0.11~0.2)	0.15 ± 0.01 (0.11~0.19)	0.15 ± 0.02 (0.11~0.2)	0.370
Second applanation time (ms)	22.09 ± 0.45 (20.81~23.52)	22.07 ± 0.44 (20.81~23.52)	22.11 ± 0.45 (21.07~23.39)	0.218^†
Second applanation length (mm)	1.68 ± 0.32 (0.84~2.29)	1.69 ± 0.32 (0.89~2.15)	1.67 ± 0.32 (0.84~2.29)	0.360^†
Velocity out (m/s)	−0.39 ± 0.07 (−0.680.17)	−0.39 ± 0.07 (−0.610.17)	−0.39 ± 0.07 (−0.680.19)	0.935
Highest concavity time (ms)	16.72 ± 0.49 (14.78~18.71)	16.7 ± 0.5 (14.78~18.25)	16.74 ± 0.49 (15.25~18.71)	0.258^†
Deformation amplitude (mm)	1.07 ± 0.09 (0.84~1.29)	1.06 ± 0.08 (0.85~1.27)	1.07 ± 0.09 (0.84~1.29)	0.257
Peak distance (mm)	5.01 ± 0.24 (4.18~5.64)	5.01 ± 0.23 (4.4~5.59)	5.02 ± 0.25 (4.18~5.64)	0.657
Highest concavity radius (mm)	6.93 ± 0.79 (4.67~9.43)	6.89 ± 0.8 (4.93~9.43)	6.96 ± 0.78 (4.67~9.39)	0.177

Student’s two-sample -test.
^†Wilcoxon rank-sum test.