Table 6.

Effects of orthokeratology on contrast sensitive function (n=22  eyes, mean ± SD).

Time	3 cpd	6 cpd	12 cpd	18 cpd	AULCSF
Mesopic
AM baseline	1.620 ± 0.19	1.677 ± 0.17	1.552 ± 0.21	1.266 ± 0.37	1.245 ± 0.10
AM 1 month	1.606 ± 0.16	1.700 ± 0.26	1.573 ± 0.29	1.272 ± 0.36	1.257 ± 0.16
PM 1 month	1.632 ± 0.12	1.706 ± 0.21	1.551 ± 0.34	1.408 ± 0.38	1.267 ± 0.15
P1	0.706	0.634	0.7	0.913	0.659
P2	0.342	0.87	0.654	0.002	0.655
High glare
AM baseline	1.636 ± 0.25	1.686 ± 0.24	1.483 ± 0.25	1.267 ± 0.37	1.235 ± 0.13
AM 1 month	1.577 ± 0.20	1.669 ± 0.32	1.517 ± 0.28	1.338 ± 0.35	1.235 ± 0.19
PM 1 month	1.613 ± 0.18	1.746 ± 0.22	1.562 ± 0.31	1.431 ± 0.38	1.285 ± 0.14
P1	0.19	0.787	0.514	0.233	0.992
P2	0.387	0.086	0.226	0.01	0.018
Photopic
AM baseline	1.722 ± 0.17	1.657 ± 0.21	1.57 ± 0.29	1.266 ± 0.36	1.251 ± 0.13
AM 1 month	1.631 ± 0.14	1.716 ± 0.28	1.59 ± 0.27	1.397 ± 0.37	1.279 ± 0.17
PM 1 month	1.678 ± 0.14	1.775 ± 0.19	1.67 ± 0.22	1.430 ± 0.38	1.326 ± 0.11
P1	0.006	0.317	0.746	0.012	0.431
P2	0.115	0.129	0.017	0.371	0.01

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.