Table 3.

Effects of orthokeratology on OSI, TFM-OSI, MTF cut-off, SR, and OVs (n=22  eyes, mean ± SD).

Time	OSI	TFM-OSI	MTF	SR	OVs-100%	OVs-20%	OVs-9%
3 mm optical zone
AM baseline	—	—	48.332 ± 8.10	0.309 ± 0.07	1.611 ± 0.27	1.778 ± 0.40	1.922 ± 0.49
AM 1 month	—	—	38.812 ± 9.58	0.225 ± 0.07	1.294 ± 0.32	1.292 ± 0.41	1.316 ± 0.46
PM 1 month	—	—	42.225 ± 8.93	0.250 ± 0.07	1.408 ± 0.30	1.448 ± 0.42	1.489 ± 0.48
P1	—	—	<0.001	<0.001	<0.001	<0.001	<0.001
P2	—	—	0.067	0.064	0.068	0.053	0.068
4 mm optical zone
AM baseline	0.295 ± 0.15	0.572 ± 0.29	46.089 ± 7.26	0.280 ± 0.05	1.537 ± 0.24	1.652 ± 0.35	1.733 ± 0.38
AM 1 month	0.652 ± 0.31	1.212 ± 0.97	37.312 ± 8.16	0.211 ± 0.05	1.244 ± 0.27	1.216 ± 0.33	1.233 ± 0.35
PM 1 month	0.712 ± 0.43	1.128 ± 0.59	38.856 ± 9.55	0.223 ± 0.06	1.295 ± 0.32	1.300 ± 0.41	1.325 ± 0.45
P1	<0.001	0.002	<0.001	<0.001	<0.001	<0.001	<0.001
P2	0.239	0.63	0.32	0.169	0.326	0.204	0.189
5 mm optical zone
AM baseline	—	—	44.812 ± 8.87	0.275 ± 0.06	1.494 ± 0.30	1.602 ± 0.40	1.687 ± 0.46
AM 1 month	—	—	37.174 ± 7.96	0.215 ± 0.05	1.239 ± 0.27	1.209 ± 0.32	1.243 ± 0.36
PM 1 month	—	—	39.124 ± 10.37	0.224 ± 0.06	1.304 ± 0.35	1.322 ± 0.44	1.339 ± 0.44
P1	—	—	0.003	0.001	0.003	0.001	0.001
P2	—	—	0.177	0.294	0.178	0.051	0.109

Paired t-test. P1: comparison between AM baseline and AM 1 month after orthokeratology; P2: comparison between AM and PM during the same day 1 month after orthokeratology.