Table 7.

Comparison of corneal asphericity of posterior surface at 3, 5, and 7 mm zones before and 3 months after ReLEx SMILE

Corneal asphericity (Q-value): posterior surface	Low myopia	Moderate myopia	High myopia
3 mmQ
Pre-op	0.23±0.43	0.00±0.28	0.18±0.41
Post-op	−0.40±0.71	−0.28±0.56	−0.34±0.39
P-value	0.170	<0.001	<0.001
5 mmQ
Pre-op	−0.10±0.16	−0.10±0.17	−0.04±0.20
Post-op	−0.51±0.27	−0.37±0.32	−0.45±0.22
P-value	0.151	<0.001	0.228
7 mmQ
Pre-op	−0.14±0.11	−0.15±0.13	−0.08±0.16
Post-op	−0.40±0.13	−0.35±0.23	−0.34±0.16
P-value	0.145	<0.001	<0.001

Abbreviations: post-op, post-operative; pre-op, pre-operative; ReLEx SMILE, Refractive Small Incision Lenticule Extraction.