Table 3.

Alterations in corneal peripheral defocus, hoas, and TZ diameter in the corneal anterior surface pre- and post- ortho-k lens treatment (mean ± SD).

Time	Corneal peripheral defocus (D)	HOAs (µm)	Horizontal coma (µm)	Vertical coma (µm)	Spherical aberration (µm)	TZ diameter
0d	NA	0.400 ± 0.185	0.024 ± 0.251	− 0.055 ± 0.242	0.196 ± 0.082	NA
1 m	7.53 ± 1.98	1.173 ± 0.345*	0.390 ± 0.486*	− 0.048 ± 0.522	0.742 ± 0.200*	2.656 ± 0.465
6 m	7.69 ± 2.10	1.227 ± 0.393*	0.414 ± 0.549*	0.011 ± 0.600	0.730 ± 0.176*	2.851 ± 0.506
12 m	7.88 ± 2.17	1.238 ± 0.333*	0.451 ± 0.486*	0.004 ± 0.606	0.720 ± 0.177*	2.907 ± 0.477
F	0.653	150.874	17.515	0.402	245.457	6.933
P-value	0.521	0.000	0.000	0.751	0.000	0.001

HOAs higher-order aberrations, TZ treatment zone, NA no applicable.

*Indicates statistical difference from baseline.