TABLE 4.

The ocular surface parameters and subsequent changes after wearing the OK lens.

	Pre-lens wear	Post-lens use (12 months)	P-value
OSDI score, mean ± SD	5.36 ± 1.15	7.42 ± 1.40	<0.001†*
TBUT (s), mean ± SD	11.98 ± 1.08	11.87 ± 1.16	0.506†
CFS score, mean ± SD	0.24 ± 0.43	0.38 ± 0.61	0.010†*
f-TBUT(s), mean ± SD	11.85 ± 0.84	11.90 ± 1.45	0.566†
a-TBUT (s), mean ± SD	13.45 ± 1.25	13.18 ± 1.00	0.472†
TMH (mm), mean ± SD	0.25 ± 0.06	0.24 ± 0.06	0.655†
Final break-up areas, mean ± SD	3.67 ± 1.98	4.31 ± 2.24	0.499†
IOP (mmHg), mean ± SD	15.31 ± 1.67	15.13 ± 1.55	0.408†
AL (mm), mean ± SD	24.09 ± 0.59	24.22 ± 0.57	0.887†

AL, axial length; CFS, corneal fluorescein staining; IOP, intraocular pressure; OK, orthokeratology; OSDI, ocular surface disease index; TBUT, tear break-up time; TMH, tear meniscus height.

^†Independent sample t-test.

*Statistically significant.

Bold values indicate P < 0.05.