Table 1.

Average epithelial, stromal and corneal thickness in central area (0–2 mm diameter).

mean ± s.d. (µm)	before Ortho-K lens wear	after Ortho-K lens wear	p-value
epithelium	53.6 ± 4.2	40.8 ± 5.3	<0.01a
stroma	515.7 ± 28.1	520.5 ± 27.6	<0.01a
cornea	569.3 ± 28.8	561.3 ± 28.8	<0.01a

^aFor Paired t-test p < 0.01.