Research Article
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 |
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Student’s two-sample -test. †Wilcoxon rank-sum test.
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