Short-Term Effects of Overnight Orthokeratology on Corneal Sensitivity in Chinese Children and Adolescents

Table 2

Parameter values previous to OK treatment and changes produced in the 3-month OK treatment.

Parameter	Baseline	1 day	1 week	1 month	3 months	F
	(Mean ± SD)
UCVA (logMAR)	0.63 ± 0.34	0.33 ± 0.21^a	0.07 ± 0.15^ab	0.02 ± 0.12^abc	0.01 ± 0.13^abc	67.776	<0.001
BCVA (logMAR)	−0.03 ± 0.04	−0.03 ± 0.04	−0.05 ± 0.04^b	−0.04 ± 0.05	−0.04 ± 0.07	1.374	0.257
SE (D)	−2.77 ± 1.04	−1.31 ± 0.81^a	−0.33 ± 0.69^ab	−0.13 ± 0.56^ab	−0.18 ± 0.44^ab	106.499	<0.001
Km (D)	43.16 ± 1.53	42.52 ± 1.37^a	41.90 ± 1.49^ab	41.80 ± 1.54^ab	41.79 ± 1.55^ab	39.960	<0.001
SRI	0.55 ± 0.26	1.03 ± 0.25^a	1.12 ± 0.25^ab	1.12 ± 0.32^a	1.03 ± 0.36^a	21.260	<0.001
E value	0.62 ± 0.09	0.40 ± 0.15^a	0.36 ± 0.19^a	0.38 ± 0.17^a	0.37 ± 0.18^a	18.124	<0.001
CCS (mm)	51.17 ± 5.36	51.00 ± 4.24	50.50 ± 5.31	47.33 ± 8.17^abc	51.17 ± 4.29^d	3.009	0.039
TCS (mm)	51.00 ± 5.78	51.67 ± 3.79	49.50 ± 5.92^b	47.83 ± 7.84^b	50.67 ± 5.98^d	2.462	0.074

SD, standard deviation; UCVA, uncorrected visual acuity; BCVA, best-corrected visual acuity; SE, spherical equivalent; Km, mean keratometry reading; SRI, Surface Regularity Index; E value, eccentricity value; CCS, central corneal sensitivity; TCS, temporal corneal sensitivity. ^aStatistically significantly different from baseline at ; ^bstatistically significantly different from 1 day after treatment at ; ^cstatistically significantly different from 1 week after treatment at ; ^dstatistically significantly different from 1 month after treatment at .