Myopia Control with a Novel Peripheral Gradient Soft Lens and Orthokeratology: A 2-Year Clinical Trial

Table 2

Mean spherical equivalent increases and SD over 2 years in 6-month intervals. The pre-study annual increase is shown in the first column. Statistically significant results are marked with an asterisk.

	12 months before	6 months	12 months	18 months	24 months
Spherical equivalent changes (D)
SRRG	−0.76 ± 0.27	−0.06 ± 0.21	−0.28 ± 0.38	−0.39 ± 0.39	−0.56 ± 0.51
OK	−0.75 ± 0.25	−0.16 ± 0.20	−0.26 ± 0.44	−0.32 ± 0.43	−0.32 ± 0.53
SV	−0.62 ± 0.25	−0.27 ± 0.13	−0.53 ± 0.25	−0.80 ± 0.40	−0.98 ± 0.58
Multiple comparisons contrast-
SV-SRRG	0.660	<
SV-OK	0.130	0.137	<	<
SRRG-OK	0.550	0.092	0.163	0.790	0.965