Table 5. Comparisons of BCVA, NVA, CH, CRF, corneal staining, and subjective discomforts over 2y.

Parameters	L-ICF group (n=22)	L-CCF group (n=22)	t/χ2	P	M-ICF group (n=28)	M-CCF group (n=25)	t/χ2	P
HC BCVA (logMAR)	-0.05±0.05	-0.04±0.06	-0.028	0.978	-0.06±0.05	-0.05±0.05	-0.800	0.427
LC BCVA (logMAR)	0.24±0.13	0.20±0.14	1.124	0.268	0.23±0.19	0.31±0.19	-1.729	0.088
NVA (logMAR)	0.03±0.02	0.03±0.03	-0.437	0.664	0.06±0.03	0.04±0.05	1.602	0.118
CH (mm Hg)	11.15±1.72	10.86±1.80	0.544	0.590	10.94±1.69	10.91±1.71	0.048	0.962
CRF (mm Hg)	11.04±2.04	11.22±1.79	-0.319	0.751	10.82±1.68	10.79±1.69	0.056	0.956
Corneal staining (G1, %)	18.18	13.64	0.000	>0.999	21.43	20.00	0.016	0.898
Corneal staining (G2, %)	9.09	18.18	0.193	0.660	14.29	16.00	0.000	>0.999
Glare, ghosting (%)	27.27	18.18	0.518	0.472	17.86	12.00	0.044	0.833
Visual fluctuation (%)	4.55	13.64	0.275	0.600	3.57	8.00	0.010	0.919

L-ICF: Low myopia subjects fitted with increased compression factor (1.75 D) ortho-k; L-CCF: Low myopia subjects fitted with conventional compression factor (0.75 D) ortho-k; M-ICF: Moderate myopia subjects fitted with increased compression factor (1.75 D) ortho-k; M-CCF: Moderate myopia subjects fitted with conventional compression factor (0.75 D) ortho-k; LC BCVA: Low-contrast best corrected visual acuity; HC BCVA: High-contrast best corrected visual acuity; NVA: Near visual acuity; CH: Corneal hysteresis; CRF: Corneal resistance factor.