The Correlation Analysis between Corneal Biomechanical Properties and the Surgically Induced Corneal High-Order Aberrations after Small Incision Lenticule Extraction and Femtosecond Laser In Situ Keratomileusis

Table 2

Stepwise multivariate linear regression analyses of factors that correlated with the alterations of the anterior corneal aberrations after SMILE and FS-LASIK.

Changes of anterior corneal HOAs	SMILE			Adjusted	FS-LASIK			Adjusted
	Priority	Beta			Priority	Beta
3rd- to 6th-order HOAs	MRSE		<0.001	0.303	MRSE		<0.001	0.574
	CRF		0.002		CRF		0.007
Spherical aberration	MRSE		<0.001	0.279	MRSE		<0.001	0.530
	CRF		0.002		CRF		<0.001
Vertical coma	MRSE		0.003	0.135	MRSE		0.009	0.079
	CRF		0.037
Horizontal coma	MRSE		0.040	0.043	MRSE		<0.001	0.332

HOAs: high-order aberrations, CRF: corneal resistance factor, MRSE: manifest refraction spherical equivalent, and beta: standardized coefficients.