Table 2.

All the parameters obtained by CorVis ST for the 4 groups, mean ± SD.

Parameters	Emmetropia (n = 21)	Low myopia (n = 21)	Moderate myopia (n = 28)	High myopia (n = 33)	P value
A1-time (ms)	7.30 ± 0.23	7.37 ± 0.22	7.50 ± 0.28#	7.42 ± 0.20	0.04
A2-time (ms)	21.88 ± 0.33	21.84 ± 0.37	21.68 ± 0.38#	21.69 ± 0.39†	0.02
A1-length (mm)	1.76 ± 0.05	1.77 ± 0.03	1.76 ± 0.08	1.78 ± 0.04	0.68
A2-length (mm)	1.67 ± 0.34	1.75 ± 0.21	1.70 ± 0.24	1.74 ± 0.25	0.71
A1-velocity (m/s)	0.15 ± 0.01	0.14 ± 0.01	0.14 ± 0.02	0.15 ± 0.01	0.10
A2-velocity (m/s)	−0.32 ± 0.05	−0.31 ± 0.08	−0.30 ± 0.05	−0.33 ± 0.07	0.37
HC-time (ms)	17.18 ± 0.47	17.06 ± 0.57	17.07 ± 1.10	17.87 ± 0.49	0.46
PD (mm)	3.80 ± 1.17	3.78 ± 1.17	4.15 ± 1.13	3.69 ± 1.22	0.47
HC radius (mm)	7.09 ± 1.08	7.12 ± 0.91	7.32 ± 0.89	6.65 ± 0.66∗	0.03
DA (mm)	1.03 ± 0.08	1.01 ± 0.09	0.98 ± 0.09	1.05 ± 0.10∗	0.048
IOP (mmHg)	13.69 ± 2.04	13.93 ± 2.11	15.03 ± 2.67	14.33 ± 1.98	0.17
CCT (μm)	537.3 ± 34.6	546.4 ± 30.0	541.7 ± 21.7	533.6 ± 32.2	0.49

A1- and A2-time: time reaching the first and second applanation; A1- and A2-length: length of the first and second applanation; A1- and A2-velocity: velocity at the first- and second-applanation moment; HC-time: highest concavity- (HC-) time; PD: peak distance; HC radius: radius at HC; DA: deformation amplitude; IOP: intraocular pressure; CCT: central corneal thickness.

^∗ P < 0.05 versus Moderate myopia group.

^# P < 0.05 versus Emmetropia group.

^† P < 0.05 versus Emmetropia group.