Corneal biomechanical properties in healthy children measured by corneal visualization scheimpflug technology

BMC Ophthalmology

Table 2 Mean values and inter-eye symmetry of corneal biomechanical parameters in subjects

Parameters	Right eye	Left eye	Mean difference (95% CI)	P*	ICC
A1T, ms	7.424 ± 0.340	7.451 ± 0.365	−0.028 (-0.067 to 0.012)	0.167	0.906
A1L, mm	1.729 ± 0.066	1.726 ± 0.094	0.003 (-0.016 to 0.021)	0.784	0.415
A1V, m/s	0.139 ± 0.020	0.138 ± 0.026	0.001 (-0.004 to 0.005)	0.861	0.592
A1DA, mm	0.119 ± 0.009	0.116 ± 0.011	0.002 (0.001 to 0.004)	0.025	0.685
A2T, ms	21.586 ± 0.869	21.401 ± 1.216	0.184 (-0.097 to 0.466)	0.197	0.224
A2L,mm	1.688 ± 0.319	1.554 ± 0.383	0.133 (0.038 to 0.228)	0.006	0.199
A2V, m/s	−0.334 ± 0.102	−0.334 ± 0.078	0.0002 (-0.022 to 0.022)	0.985	0.451
A2DA, mm	0.367 ± 0.131	0.372 ± 0.141	−0.004 (-0.038 to 0.030)	0.800	0.396
HCT, ms	16.675 ± 0.502	16.735 ± 0.555	−0.060 (-0.197 to 0.077)	0.389	0.137
PD, mm	2.940 ± 1.083	2.686 ± 1.080	0.253 (-0.037 to 0.544)	0.086	0.027
RoC, mm	6.470 ± 1.295	6.438 ± 1.318	0.032 (-0.265 to 0.330)	0.831	0.449
MDA, mm	0.993 ± 0.102	0.982 ± 0.100	0.011 (-0.002 to 0.024)	0.088	0.872

Data were presented as mean ± standard deviation
95% CI 95% confidential interval, *paired t test, ICC intraclass correlation coefficient
A1T Time from start to the first flatterning of cornea, A1L Length of flattened cornea in the first applanation, A1V Inward velocity of the cornea in the first applanation, A1DA Cornea apex displacement in vertical direction at first applanation, A2T Time from start to second flattening of the cornea, A2L Length of flattened cornea in the second applanation, A2V Outward velocity of the cornea in the second applanation, A2DA Cornea apex displacement in vertical direction at second applanation, HCT Time from start to the highest concavity of cornea, PD Distance between the corneal peaks at maximal concavity, RoC Radius of curvature of the corneal at highest concavity, MDA Cornea apex displacement in vertical direction at highest concavity
Bold indicates statistical significance (P < 0.05)

ISSN: 1471-2415